Merged V2.2 to HEAD

7732: Support to cache null QName look ups ...
   7733: Support for store ACLs
   7741: Fix for over keen stiore ACLs ....
   7794: Fix for WCM-1019, tasks show all assets as modified when only one has
   7996: Fix for AWC-1519: cancelling discussion creation results in error


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@8448 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/domain/hibernate/HibernateQNameDAOImpl.java

@@ -164,6 +164,14 @@ public class HibernateQNameDAOImpl extends HibernateDaoSupport implements QNameD
                 // We found something, so we can add it to the cache
                 qnameEntityCache.put(qname, id);
             }
+            else
+            {
+                qnameEntityCache.put(qname, -1L);
+            }
+        }
+        else if(id == -1L)
+        {
+            return null;
         }
         else
         {