Bug 741744 - part2 - MOD operations with chained delete/add get back error 53 on backend config
    
    https://bugzilla.redhat.com/show_bug.cgi?id=741744
    Resolves: bug 741744
    Bug Description: part2 - MOD operations with chained delete/add get back error 53 on backend config
    Reviewed by: nhosoi (Thanks!)
    Branch: master
    Fix Description: If a value was specified with a mod delete, fail the entire
    modify operation with LDAP_NO_SUCH_ATTRIBUTE if the specified value does not
    match the current value.
    Platforms tested: RHEL6 x86_64
    Flag Day: no
    Doc impact: no