public static void dropAllConnections() {
      LOG.info("clearing all viewSingletonObjects.");
      viewSingletonObjects.clear();
  }
Method for testing purposes, intended to clear the cached user-local instances.
Drops all classes of user-local variables.
Method should not normally be called from production code.
contrib/views/utils/src/main/java/org/apache/ambari/view/utils/UserLocal.java