Audit logging improvements

gms/src/main/java/it/inaf/ia2/gms/authn/JWTFilter.java

gms/src/main/java/it/inaf/ia2/gms/manager/GroupsManager.java

...a/it/inaf/ia2/gms/manager/InvitedRegistrationManager.java

.../main/java/it/inaf/ia2/gms/manager/MembershipManager.java

...main/java/it/inaf/ia2/gms/manager/PermissionsManager.java

...src/main/java/it/inaf/ia2/gms/persistence/LoggingDAO.java

...in/java/it/inaf/ia2/gms/persistence/model/ActionType.java

gms/src/main/java/it/inaf/ia2/gms/service/GroupsService.java

gms/src/main/java/it/inaf/ia2/gms/service/JoinService.java

...main/java/it/inaf/ia2/gms/service/PermissionsService.java

gms/src/main/resources/sql/init.sql

gms/src/main/resources/sql/upgrade.sql

...test/java/it/inaf/ia2/gms/persistence/LoggingDAOTest.java

...rc/test/java/it/inaf/ia2/gms/service/JoinServiceTest.java