PT50384085 - Core dump in sipxproxy on openuc.ezuce.com
PT50388145 - Core dump in sipregistrar on openuc.ezuce.com
PT49824827 - Core dump in sipXproxy on reboot

Proxy and registrar were crashing on shutdown because of an assertion in
mongo cleanup code. It seems that mongo needs some help to cleanup nicely
and this is done by adding an explicit call to mongo::dbexit(mongo::EXIT_CLEAN).
PT50385571 - Core dump 1 in sipstatus on openuc.ezuce.com

Status was crashing on shutdown because of an assertion in
mongo cleanup code. It seems that mongo needs some help to cleanup nicely
and this is done by adding an explicit call to mongo::dbexit(mongo::EXIT_CLEAN).
Merge remote-tracking branch 'origin/PT50384085' into release-4.6