Fine tune ProjectService tests

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Build succeeded (check pipeline).

[codecov-commenter]

Codecov Report

Merging #1082 (8f82a92) into master (bd6abe6) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #1082   +/-   ##
=========================================
  Coverage     83.16%   83.16%           
  Complexity     2607     2607           
=========================================
  Files           345      345           
  Lines          6675     6675           
  Branches        480      480           
=========================================
  Hits           5551     5551           
  Misses          927      927           
  Partials        197      197           

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• https://checklist.intgdc.com/job/compliance/job/gooddata-java-merge-compliance-check/260/ : SUCCESS in 16s
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