Upgrade overhaul: Retiring ancient patches and fixing de-Hibernate problems

- Moved setting of txn isolation level to ControlDAO
 - Retired patches where target schema is < 100
  - Removed unreferenced patch implementations
  - Removed unreferenced DB scripts
 - Moved patch-specific queries (ACL upgrade counts) into patch-common-SqlMap.xml
 - Fixed count query result processing (max of nothing is NULL) leading to unboxing NPEs
 - All DM-modifying patches depend on DmPermissionsPatch i.e. it will normally run immediately after SQL scripts


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@21908 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/domain/control/ControlDAO.java

@@ -96,4 +96,16 @@ public interface ControlDAO
      * @see #createSavepoint(String)
      */
     public void releaseSavepoint(Savepoint savepoint);
+    
+    /**
+     * Change the current transaction isolation level.
+     * <p/>
+     * <b>Note:</b> The isolation level should not - and for some DBs, cannot - be changed
+     *              except at the very start of the transaction
+     * 
+     * @param isolationLevel        the transaction isolation level
+     * @return                      Returns the previously-set isolation
+     * @throws IllegalStateException    if the isolation level is invalid or cannot be changed
+     */
+    public int setTransactionIsolationLevel(int isolationLevel);
 }