[KEYCLOAK-8101] Return just cached deployment to prevent NPE

adapters/oidc/osgi-adapter/src/main/java/org/keycloak/adapters/osgi/PathBasedKeycloakConfigResolver.java

@@ -87,6 +87,7 @@ public class PathBasedKeycloakConfigResolver implements KeycloakConfigResolver {
             if (!cacheConfiguration(pathFragment, configuration)) {
                 throw new IllegalStateException("Not able to read the file " + configuration);
             }
+            deployment = getCachedDeployment(pathFragment);
         }
 
         return deployment;