Ticket 47599 - Reduce lock scope in retro changelog plug-in
Description: Forgot to add definition of retrocl_cn_lock
https://fedorahosted.org/389/ticket/47599
Reviewed by: richm(Thanks!!)
(cherry picked from commit b330876a1bccd93a8e906ac56a10c002c981ecfc)
(cherry picked from commit f4d5900579c773e5cf4b69eaeba6104078512ab0)
(cherry picked from commit b19239fdca5c00865471acfd5ffc8502c66b914a)