Path escape fix in UserService.GetPackage()

[Abiji-2020]

• Run liniting, testing commands
• Modified the test to ensure the escape sequence.

Fixes: #3262.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.27%. Comparing base (8f3c64e) to head (687dc80).
Report is 1 commits behind head on master.

Additional details and impacted files

@@ Coverage Diff @@## master #3522 +/- ##
=======================================
Coverage 91.27% 91.27% =======================================
Files 183 183 Lines 16099 16099 =======================================
Hits 14695 14695 Misses 1230 1230 Partials 174 174 

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[gmlewis]

Thank you, @Abiji-2020!
LGTM.

Awaiting second LGTM+Approval from any other contributor to this repo before merging.

@stevehipwell - might you have time for a code review? Thank you!

[stevehipwell]

LGTM

[gmlewis]

Thank you, @stevehipwell!
Merging.