Removed the need to manually specify TF Id

Breaking change. Renamed authentication environment variables to make them more clear and more consistent with other variables

HUBOT_VSONLINE_ADAPTER_AUTH_USER -> HUBOT_VSONLINE_ADAPTER_BASIC_AUTH_USERNAME

HUBOT_VSONLINE_ADAPTER_AUTH_PASSWORD -> HUBOT_VSONLINE_ADAPTER_BASIC_AUTH_PASSWORD
Don't do async calls on run
  If run doesn't do async calls for initialization it works better when running under windows azure web sites, since hubot isn't loaded immediately but only when the first call is made.