Got rid of a lot of no longer needed work in Lookup.add(). Minimized

the number of explicit session.flush()s. Fixed several places that
were throwing uninformative exceptions.


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/WCM-DEV2/root@3227 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

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

@@ -532,7 +532,14 @@ class AVMTester implements Runnable
     private void snapshot() 
     {
         System.out.println("snapshot");
-        fService.createSnapshot("main");
+        try
+        {
+            fService.createSnapshot("main");
+        }
+        catch (AVMExistsException aee)
+        {
+            // Do nothing. It's OK.
+        }
     }
     
     public boolean getError()