OZG-4624 rename jenkinsfile, cleanup, rename kubernetes CR names

Jenkinsfile

doc/examples/client-alfa.yaml

doc/examples/realm-berlin.yaml

doc/examples/user-helge.yaml

...loud/operator/keycloak/client/OzgCloudKeycloakClient.java

...loud/operator/keycloak/user/UserUpdateControlBuilder.java

...perator/keycloak/client/KeycloakClientReconcilerTest.java

.../ozgcloud/operator/keycloak/client/KeycloakLivelTest.java

.../operator/keycloak/group/KeycloakGroupReconcilerTest.java

...cloud/operator/keycloak/user/KeycloakUserServiceTest.java