Reduce call-id logging resource usage.

Since there is no need for the call-id logging ao2 object to have a lock,
don't create it with one.
........

Merged revisions 379232 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@379233 65c4cc65-6c06-0410-ace0-fbb531ad65f3