WHISTLE-1441: use the pvt_created as a fallback value
WHISTLE-1441: check the agent's status before starting the agent process
WHISTLE-1441: macro-ize the wrapup message
WHISTLE-1441: add the timestamp field when saving new agent status
WHISTLE-1441: update spec for json objects
WHISTLE-1441: add some bookkeeping for monitoring call
WHISTLE-1441: log the other agent process who took the call
Merge branch 'WHISTLE-1441'