OZG-5951 restructure call of realmExist in reconciler

ozgcloud-keycloak-operator/src/test/java/de/ozgcloud/operator/keycloak/realm/KeycloakRealmServiceTest.java

@@ -237,7 +237,7 @@ class KeycloakRealmServiceTest {
 
 		@Test
 		void shouldCallGenericRemoteServiceRealmExists() {
-			keycloakGenericRemoteService.realmExists(REALM_NAME);
+			service.realmExists(REALM_NAME);
 
 			verify(keycloakGenericRemoteService).realmExists(REALM_NAME);
 		}