Setting key rotation to be off by default

Key rotation breaks compatibility between (trunk/1.6.1) and (1.2/1.4/1.6.0).  As a follow up to this, I am investigating possible ways to allow key rotation to be on by default and not affect the other branches, but for now it must be turned off. 


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@175127 65c4cc65-6c06-0410-ace0-fbb531ad65f3