Fixed #isSeniorClusterMember when it's used in the middle of the cluster startup.

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@8515 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/util/cache/CacheFactory.java

@@ -163,11 +163,6 @@ public class CacheFactory {
      * @return true if this cluster member is the senior or if clustering is not enabled.
      */
     public static boolean isSeniorClusterMember() {
-        synchronized(CacheFactory.class) {
-            if (!isClusteringStarted()) {
-                return true;
-            }
-        }
         return cacheFactoryStrategy.isSeniorClusterMember();
     }