Ticket #576 - DNA: use event queue for config update only at the start up
https://fedorahosted.org/389/ticket/576
Bug description: DNA config updates were always put into the
event queue and executed in 30 seconds, which increased a chance
to conflict with the ordinary modify operations and cause db
deadlocks.
Fix description: The 30 seconds delay is necessary at the start-
up time when MMR is configured to guarantee the shared config is
logged in the changelog. This patch leaves the behaviour of the
config update at the start-up as it is; the rest won't be queued
but updated immediately.
Reviewed by Rich (Thank you!!)