Merge branch 'stable-2.15'

* stable-2.15:
  Fix Sonar code smell issue
  ConfigurationTest: Replace unnecessary member with local variable
  RateLimitUploadPackIT: Remove unnecessary method parameter list
  RateLimitUploadPackIT: Make private methods access explicit
  RateLimitUploadPackIT: Remove duplication for username

Change-Id: I33e7a8c2e0332f50ca3eb226d1d814d24388f4bb