Added BasicAuth/JWT service endpoints

...in/java/it/inaf/ia2/gms/authn/CustomIdTokenConverter.java

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

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

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

...in/java/it/inaf/ia2/gms/authn/ServiceBasicAuthFilter.java

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

...naf/ia2/gms/controller/BasicAuthWebServiceController.java

...n/java/it/inaf/ia2/gms/controller/HomePageController.java

...a/it/inaf/ia2/gms/controller/JWTWebServiceController.java

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

...main/java/it/inaf/ia2/gms/persistence/MembershipsDAO.java

...ava/it/inaf/ia2/gms/authn/ServiceBasicAuthFilterTest.java

...ia2/gms/controller/BasicAuthWebServiceControllerTest.java

...va/it/inaf/ia2/gms/controller/HomePageControllerTest.java