OZG-6731 OZG 6763 User laden mit rollen und refaktoring

...n/settings/src/lib/user/keycloak.resource.service.spec.ts

.../admin/settings/src/lib/user/keycloak.resource.service.ts

alfa-client/libs/admin/settings/src/lib/user/user.model.ts

...bs/admin/settings/src/lib/user/user.repository.service.ts

.../libs/admin/settings/src/lib/user/user.repository.spec.ts

...ent/libs/admin/settings/src/lib/user/user.service.spec.ts

alfa-client/libs/admin/settings/src/lib/user/user.service.ts

...admin/settings/src/lib/users-roles/userAndRolesService.ts

...min/settings/src/lib/users-roles/users-roles.component.ts

alfa-client/libs/admin/settings/test/user/user.ts