D-Net

Update HelloWorldService, check if token is valid and user is registered at getUserClaims

Update HelloWorldService, check if token is valid and user is admin at getResultClaims

Update HelloWorldService, check if token is valid and if user is admin at getContextClains

Update HelloWorldService, check if token is valid and if user is admin

Update HelloWorldService, check if user is admin at getAllClaims

Add Authorization.java

Added token in every API claim method.

Update JWTValidator, add a first draft with jwt's exception handling

Update JWTValidator, remove comments

Update HelloWorldService.java, Add Response isValid