Added 'version' column to ADM entities

- A patch will assign initial version values to the entities
 - Deprecated TransactionUtil in favour of the RetryingTransactionHelper
 - Renamed RetryingTransactionHelper.Callback to RetryingTransactionHelper.RetryingTransactionCallback
   The name Callback clashes with many other classes in the classpath
 - Moved loads of components to be included in the retry behaviour
Duplicate name checks
 - This is done using a query, but the entity update is not written to the database early
 - Concurrent adds of the same-named child node will only fail at the end of the transaction
 - TODO: Detect the duplicate violation during transaction retrying
Workaround for ADMLuceneTest
 - Disable session size resource management during tests


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@5823 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/domain/Store.java

@@ -38,6 +38,11 @@ public interface Store
      * @return Returns the key for the class
      */
     public StoreKey getKey();
+    
+    /**
+     * @return  Returns the current version number used for optimistic locking
+     */
+    public Long getVersion();
 
     /**
      * @param key the key uniquely identifying this store