OZG-3961 OZG-4082 revert to keycloak namespace temp

src/main/java/de/ozgcloud/operator/keycloak/user/KeycloakUserRemoteService.java

@@ -120,7 +120,7 @@ class KeycloakUserRemoteService {
 		log.log(Level.INFO, "Create secret for user: " + userSpec.getKeycloakUser().getUsername());
 		var secretName = userSpec.getKeycloakUser().getUsername().toLowerCase() + "-credentials";
 
-		var namespace = createdNamespace;
+		var namespace = "keycloak";
 		var secret = getSecret(secretName, namespace);
 		if (Objects.isNull(secret.get())) {
 			log.log(Level.INFO, "...secret does not exist, create one...");