Ticket 47629 - random crashes related to sync repl
Bug Description: if there is no cookie, the persist thread starts
before the initial refresh is complete, both threads use the
same operation structure and there is a race condition
on setting and freeing the search entry.
Fix Description: ensure that the persist thread only starts sending
updates once the refresh is complete
https://fedorahosted.org/389/ticket/47629
Reviewed by: Rich, thanks