15473: ETHREEOH-2574: Fixed problem when LDAP sync attempts to delete a user who already exists but with username in a different case (e.g. guest -> Guest)
- ACLs were getting left behind due to case issues
- Now 'normalize' the name using getUserIdentifier()
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@15474 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261