Fix email shares not being shown to other users

[st3iny]

I adapted the logic from

server/lib/private/Share20/DefaultShareProvider.php

Lines 729 to 740 in 6d5d91f

	if ($reshares === false) {
	$qb->andWhere($qb->expr()->eq('uid_initiator', $qb->createNamedParameter($userId)));
	} else {
	if ($node === null) {
	$qb->andWhere(
	$qb->expr()->orX(
	$qb->expr()->eq('uid_owner', $qb->createNamedParameter($userId)),
	$qb->expr()->eq('uid_initiator', $qb->createNamedParameter($userId))
	)
	);
	}
	}

How to reproduce?

• Install groupfolders app.
• Have at least two users in the same group.
• Create groupfolder with some subfolders.
• Share subfolder by mail to external mail address.

Expected behaviour:

Share by mail is shown to other users in the same group. Sharing sub folders of groupfolders with users works like this too.

Current behaviour

Share is only shown to the admin who created the share.

Screenshots

Before	After

[st3iny]

/backport to stable24

[st3iny]

/backport to stable23

[st3iny]

/backport to stable22

[PVince81]

@st3iny please squash

[PVince81]

suspicious failure:

/src/Exception/RequestException.php","Line":113,"CustomMessage":"error while sending notification for federated share: Client error: `POST http://localhost:8080/index.php/ocm/notifications` resulted in a `400 Bad request` response:\n{\"message\":\"Can not find share with ID: 15\"}\n"}}

[st3iny]

suspicious failure:

/src/Exception/RequestException.php","Line":113,"CustomMessage":"error while sending notification for federated share: Client error: `POST http://localhost:8080/index.php/ocm/notifications` resulted in a `400 Bad request` response:\n{\"message\":\"Can not find share with ID: 15\"}\n"}}

That seems like a false alarm. This error also exists in other drone runs. I rebased to latest master to fix the failing scenario. I ran the integration test locally and it did not fail after rebasing.

[st3iny]

/backport to stable23

[st3iny]

/backport to stable22