[stable19] LDAP: fix null where IUser is expected in update groups background job

[backportbot-nextcloud]

⚠️ This backport had conflicts and is incomplete ⚠️

backport of #23799

[faily-bot]

🤖 beep boop beep 🤖

Here are the logs for the failed build:

Status of 34918: failure

nodb

Show full log

There was 1 error:
1) OCA\user_ldap\tests\Jobs\UpdateGroupsTest::testHandleKnownGroups
Error: Using $this when not in object context
/drone/src/apps/user_ldap/lib/Jobs/UpdateGroups.php:121
/drone/src/tests/lib/TestCase.php:210
/drone/src/apps/user_ldap/tests/Jobs/UpdateGroupsTest.php:183
--
There were 29 warnings:
1) Test\AppFramework\Controller\AuthPublicShareControllerTest::testAuthenticateAuthenticated
Trying to configure method "isAuthenticated" which cannot be configured because it does not exist, has not been specified, is final, or is static
2) Test\AppFramework\Http\ResponseTest::testCacheSeconds
Method getTime may not return value of type string, its return declaration is ": int"
3) OCA\DAV\Tests\unit\CalDAV\CalendarTest::testConfidentialClassification with data set #0 (3, false)
No method rule is set
4) OCA\DAV\Tests\Command\MoveCalendarTest::testMove
Using assertContains() with string haystacks is deprecated and will not be supported in PHPUnit 9. Refactor your test to use assertStringContainsString() or assertStringContainsStringIgnoringCase() instead.
5) OCA\DAV\Tests\unit\BackgroundJob\UpdateCalendarResourcesRoomsBackgroundJobTest::testRun
Passing an array of interface names to createMock() for creating a test double that implements multiple interfaces is deprecated and will no longer be supported in PHPUnit 9.
Passing an array of interface names to getMockBuilder() for creating a test double that implements multiple interfaces is deprecated and will no longer be supported in PHPUnit 9.
6) ExpirationTest::testParseRetentionObligation with data set #0 ('disabled', null, null, null)
assertAttributeEquals() is deprecated and will be removed in PHPUnit 9.
readAttribute() is deprecated and will be removed in PHPUnit 9.
getObjectAttribute() is deprecated and will be removed in PHPUnit 9.
7) ExpirationTest::testParseRetentionObligation with data set #1 ('auto', 30, -1, true)
assertAttributeEquals() is deprecated and will be removed in PHPUnit 9.
readAttribute() is deprecated and will be removed in PHPUnit 9.
getObjectAttribute() is deprecated and will be removed in PHPUnit 9.
8) ExpirationTest::testParseRetentionObligation with data set #2 ('auto,auto', 30, -1, true)
assertAttributeEquals() is deprecated and will be removed in PHPUnit 9.
readAttribute() is deprecated and will be removed in PHPUnit 9.
getObjectAttribute() is deprecated and will be removed in PHPUnit 9.
9) ExpirationTest::testParseRetentionObligation with data set #3 ('auto, auto', 30, -1, true)
assertAttributeEquals() is deprecated and will be removed in PHPUnit 9.
readAttribute() is deprecated and will be removed in PHPUnit 9.
getObjectAttribute() is deprecated and will be removed in PHPUnit 9.
10) ExpirationTest::testParseRetentionObligation with data set #4 ('auto, 3', -1, 3, true)
assertAttributeEquals() is deprecated and will be removed in PHPUnit 9.
readAttribute() is deprecated and will be removed in PHPUnit 9.
getObjectAttribute() is deprecated and will be removed in PHPUnit 9.
11) ExpirationTest::testParseRetentionObligation with data set #5 ('5, auto', 5, -1, true)
assertAttributeEquals() is deprecated and will be removed in PHPUnit 9.
readAttribute() is deprecated and will be removed in PHPUnit 9.
getObjectAttribute() is deprecated and will be removed in PHPUnit 9.
12) ExpirationTest::testParseRetentionObligation with data set #6 ('3, 5', 3, 5, false)
assertAttributeEquals() is deprecated and will be removed in PHPUnit 9.
readAttribute() is deprecated and will be removed in PHPUnit 9.
getObjectAttribute() is deprecated and will be removed in PHPUnit 9.
13) ExpirationTest::testParseRetentionObligation with data set #7 ('10, 3', 10, 10, false)
assertAttributeEquals() is deprecated and will be removed in PHPUnit 9.
readAttribute() is deprecated and will be removed in PHPUnit 9.
getObjectAttribute() is deprecated and will be removed in PHPUnit 9.
14) OCA\Files_Versions\Tests\ExpirationTest::testParseRetentionObligation with data set #0 ('disabled', null, null, null)
assertAttributeEquals() is deprecated and will be removed in PHPUnit 9.
readAttribute() is deprecated and will be removed in PHPUnit 9.
getObjectAttribute() is deprecated and will be removed in PHPUnit 9.
15) OCA\Files_Versions\Tests\ExpirationTest::testParseRetentionObligation with data set #1 ('auto', -1, -1, true)
assertAttributeEquals() is deprecated and will be removed in PHPUnit 9.
readAttribute() is deprecated and will be removed in PHPUnit 9.
getObjectAttribute() is deprecated and will be removed in PHPUnit 9.
16) OCA\Files_Versions\Tests\ExpirationTest::testParseRetentionObligation with data set #2 ('auto,auto', -1, -1, true)
assertAttributeEquals() is deprecated and will be removed in PHPUnit 9.
readAttribute() is deprecated and will be removed in PHPUnit 9.
getObjectAttribute() is deprecated and will be removed in PHPUnit 9.
17) OCA\Files_Versions\Tests\ExpirationTest::testParseRetentionObligation with data set #3 ('auto, auto', -1, -1, true)
assertAttributeEquals() is deprecated and will be removed in PHPUnit 9.
readAttribute() is deprecated and will be removed in PHPUnit 9.
getObjectAttribute() is deprecated and will be removed in PHPUnit 9.
18) OCA\Files_Versions\Tests\ExpirationTest::testParseRetentionObligation with data set #4 ('auto, 3', -1, 3, true)
assertAttributeEquals() is deprecated and will be removed in PHPUnit 9.
readAttribute() is deprecated and will be removed in PHPUnit 9.
getObjectAttribute() is deprecated and will be removed in PHPUnit 9.
19) OCA\Files_Versions\Tests\ExpirationTest::testParseRetentionObligation with data set #5 ('5, auto', 5, -1, true)
assertAttributeEquals() is deprecated and will be removed in PHPUnit 9.
readAttribute() is deprecated and will be removed in PHPUnit 9.
getObjectAttribute() is deprecated and will be removed in PHPUnit 9.
20) OCA\Files_Versions\Tests\ExpirationTest::testParseRetentionObligation with data set #6 ('3, 5', 3, 5, false)
assertAttributeEquals() is deprecated and will be removed in PHPUnit 9.
readAttribute() is deprecated and will be removed in PHPUnit 9.
getObjectAttribute() is deprecated and will be removed in PHPUnit 9.
21) OCA\Files_Versions\Tests\ExpirationTest::testParseRetentionObligation with data set #7 ('10, 3', 10, 10, false)
assertAttributeEquals() is deprecated and will be removed in PHPUnit 9.
readAttribute() is deprecated and will be removed in PHPUnit 9.
getObjectAttribute() is deprecated and will be removed in PHPUnit 9.
22) OCA\Files_Versions\Tests\ExpirationTest::testParseRetentionObligation with data set #8 ('g,a,r,b,a,g,e', -1, -1, true)
assertAttributeEquals() is deprecated and will be removed in PHPUnit 9.
readAttribute() is deprecated and will be removed in PHPUnit 9.
getObjectAttribute() is deprecated and will be removed in PHPUnit 9.
23) OCA\Files_Versions\Tests\ExpirationTest::testParseRetentionObligation with data set #9 ('-3,8', -1, -1, true)
assertAttributeEquals() is deprecated and will be removed in PHPUnit 9.
readAttribute() is deprecated and will be removed in PHPUnit 9.
getObjectAttribute() is deprecated and will be removed in PHPUnit 9.
24) OCA\Provisioning_API\Tests\Controller\UsersControllerTest::testAddSubAdminSuccessful
Method createSubAdmin may not return value of type boolean, its return declaration is ": void"
25) OCA\Provisioning_API\Tests\Controller\UsersControllerTest::testRemoveSubAdminSuccessful
Method deleteSubAdmin may not return value of type boolean, its return declaration is ": void"
26) OCA\Settings\Tests\Mailer\NewUserMailHelperTest::testGenerateTemplateWithPasswordResetToken
Method getTime may not return value of type string, its return declaration is ": int"
27) OCA\TwoFactorBackupCodes\Tests\Unit\Listener\ActivityPublisherTest::testHandleCodesGeneratedEvent
Method publish may not return value of type Mock_IEvent_7af775eb, its return declaration is ": void"
28) OCA\UpdateNotification\Tests\Notification\BackgroundJobTest::testCreateNotifications with data set #1 ('app2', '1.0.1', '1.0.0', '1.0.0', true, array('user1'), array(array('user1')))
Method notify may not return value of type Mock_INotification_49a32dde, its return declaration is ": void"
29) OCA\UpdateNotification\Tests\Notification\BackgroundJobTest::testCreateNotifications with data set #2 ('app3', '1.0.1', false, false, true, array('user2', 'user3'), array(array('user2'), array('user3')))
Method notify may not return value of type Mock_INotification_49a32dde, its return declaration is ": void"

[blizzz]

diverts too much, I hand in a minimal PR instead