Logger: Add manager command 'LoggerRotate' to rotate logger

Part of a series of AMI command equivalents to existing CLI
commands

Review: https://reviewboard.asterisk.org/r/3651/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@416848 65c4cc65-6c06-0410-ace0-fbb531ad65f3