Merge pull request #109 from tkrille/cleanup

cleanup
[cleanup] EntitlementsEntity_ replaced by EntitlementEntity
Merge pull request #110 from davidmoebius/update_meta_modell

[cleanup] EntitlementsEntity_ replaced by EntitlementEntity
[cleanup] suppressed sonar violations on equals mthods
[cleanup] decreased complexity of if statement
[cleanup] changed visibility of injected resource dao
[cleanup] removed obsolete entity manager field
[cleanup] made enum to string correlation map final
[cleanup] replaced string literals with constant