Ticket #382 - DS Shuts down intermittently
    
    https://fedorahosted.org/389/ticket/382
    Resolves: Ticket #382
    Bug Description: DS Shuts down intermittently
    Reviewed by: nhosoi (Thanks!)
    Branch: master
    Fix Description: ldbm_back_delete should not touch the backentry to
    be deleted while it is in the cache.  Any mods made by any plugins should
    be made to the tombstone or to a copy of the original entry.
    Platforms tested: Fedora 17
    Flag Day: no
    Doc impact: no
    (cherry picked from commit 7146bb325de67b036dfa39b898c030ee414337f9)