Voicemail prepartion initial code
Test: VoicemailPreparation terminates call on timeout
Fixed sipgateway.xml - Voicemail constructor
Voicemail preparation impl
Adding more logs
Fix voicemail preparation
Fixed signaling -  voicemail forward
Voicemail prep: SIP terminate cancel forward task
Fixed voicemail prep - cancel forward task if SIP cancel call
Fixing ringing direction
Revert "Fixing ringing direction"

This reverts commit 13ee49c993825e51d47920a68af3588551044227.
Fixing Responder in voicemail forward IQ
patch for call conf
Version Increase
[CORE-1443] Fixed problem in the Fake ring IQ that was causing the baddly formated log lines
[VOICE-108] Maximum inbound call duration
Merged changes from master