Revisit resume/end/error/expired conversation stories

[compulim]

Note to investigator

Find out all permutations of the resume/end/error/expired over REST API and Web Socket.

Related issues

• Resume conversation after call botConnection.end()  #118 Resume conversation after calling botConnection.end()
• DirectLine token is getting expired and I'm not able to generate a new one(using websocket) #101 "Token expired" signal is not fired on Web Socket route
• Story on resuming conversation #103 Generate a new token using existing conversation ID
• Stop conversation is not working #94 End conversation does not really stop the polling or Web Socket
• Direct Line JS: Backoff on 429, stop on 404, and relax on 400 #90 Backoff stories
  • HTTP 429/400 - we will back off
  • HTTP 404 - fatal, we will stop
• Shutting down websocket connection does not change the connectionStatus #75 End conversation does not really stop Web Socket
• Resume conversation #9 Resume conversation and how to renew expired token
• Add reconnection logic BotFramework-WebChat#1880 Wiring up for reconnect UI