Ticket #548 - RFE: Allow AD password sync to update shadowLastChange
Description: Commit 17f3624c19929ffa1d37a567b7a889fd397cca59 for
the this ticket always replaced the shadow attributes before sending
the entry back to the client. It is not just necessary but harmful
since it could cause the conflicts among threads that return same
entries.
https://fedorahosted.org/389/ticket/548
Reviewed by wibrown@redhat.com (Thank you, William!!)