Added getCommonAncestor to AVMService + test. Added to console test app.

Changed createSnapshot flavors to return version ids just created instead of void.


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/WCM-DEV2/root@3270 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/avm/Repository.java

@@ -46,8 +46,9 @@ interface Repository
      * Snapshots this repository.  This sets all nodes in the
      * the repository to the should be copied state, and creates
      * a new version root.
+     * @return The version id of the newly created snapshot.
      */
-    public void createSnapshot();
+    public int createSnapshot();
 
     /**
      * Create a new directory.