Included FE dist files inside Spring application; Groups model logic

.gitignore

gms-ui/.env.production

gms-ui/src/api/server/index.js

gms/pom.xml

gms/src/main/java/it/inaf/ia2/gms/authn/OAuth2Config.java

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

...ain/java/it/inaf/ia2/gms/controller/GroupsController.java

...c/main/java/it/inaf/ia2/gms/model/GroupsModelRequest.java

gms/src/main/java/it/inaf/ia2/gms/model/IdentityType.java

...ava/it/inaf/ia2/gms/persistence/MembershipRepository.java

...va/it/inaf/ia2/gms/persistence/PermissionsRepository.java

gms/src/main/java/it/inaf/ia2/gms/rap/RapClient.java

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

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

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

gms/src/main/resources/application.properties

...java/it/inaf/ia2/gms/controller/GroupsControllerTest.java