Fixed Entities for Security project and User-Manager
Merge branch 'fetaure/FixedEntitiesForSecurityAndUserManager' into feature/ApplicantsNotifications

Conflicts:
	entity/src/main/java/com/softserveinc/ita/entity/Applicant.java
	entity/src/main/java/com/softserveinc/ita/entity/Group.java
	entity/src/main/java/com/softserveinc/ita/entity/User.java
Resolved problems with group and dao