Allow API access to Elide for services without user authentication

[bukajsytlos]

Closes #793 Allow API access to Elide for services without user authentication

[codecov]

Codecov Report

Merging #802 (9f50171) into develop (ee3e472) will decrease coverage by 0.10%.
The diff coverage is 73.19%.

Additional details and impacted files

@@              Coverage Diff              @@
##             develop     #802      +/-   ##
=============================================
- Coverage      78.28%   78.18%   -0.10%     
- Complexity      1248     1254       +6     
=============================================
  Files            242      244       +2     
  Lines           3776     3805      +29     
  Branches         241      241              
=============================================
+ Hits            2956     2975      +19     
- Misses           715      724       +9     
- Partials         105      106       +1     

Files	Coverage Δ
...in/java/com/faforever/api/data/DataController.java	73.91% <100.00%> (ø)
...ver/api/data/checks/IsClanMembershipDeletable.java	85.71% <100.00%> (ø)
...a/com/faforever/api/data/checks/IsEntityOwner.java	60.00% <100.00%> (ø)
...faforever/api/data/checks/IsEntityOwnerFilter.java	85.71% <100.00%> (ø)
...com/faforever/api/data/domain/GroupPermission.java	80.00% <ø> (ø)
...com/faforever/api/data/hook/BanInfoCreateHook.java	100.00% <100.00%> (ø)
...r/api/data/hook/BanInfoRevokeAuthorUpdateHook.java	100.00% <100.00%> (ø)
.../faforever/api/data/hook/ModerationReportHook.java	92.30% <100.00%> (ø)
...ain/java/com/faforever/api/security/ElideUser.java	70.00% <100.00%> (+12.85%)	⬆️
...faforever/api/security/FafAuthenticationToken.java	78.57% <ø> (-5.64%)	⬇️
... and 10 more

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[bukajsytlos]

will try to add some tests