AuthorizationService.java: [Bug fix] Added "authentication.getPrincipal() instanceof User" check before casting authentication.getPrincipal() to User - if user is not logged in, it is String.
1. AuthorizationService.java: [Bug fix] In method "curator()", "CURATOR" is a prefix, not suffix in role.
2. AuthorizationConfiguration.java: Comment "@PropertySources" as this is a library project and properties are set by parent project.
1. Add private method "mapType()", to map "organization" to "institution" and "ri" to "community" for roles.
2. Add public method "getRoles()" to access roles (as Strings) from Granted Authorities.