• Improve speed of st2 execution list command by not requesting result and
  trigger_instance attributes. The effect of this change will be especially pronounced for
  installations with a lot of large executions (large execution for this purpose is an execution
  with a large result).
• Improve speed of st2 execution get command by not requesting result and
  trigger_instance attributes.
• Now when running st2api service in debug mode (--debug) flag, all the JSON responses are
  pretty indented.
• When using st2 execution list and st2 execution get CLI commands, display execution
  elapsed time in seconds for all the executions which are currently in "running" state.
• Fix a race condition in sensor container where a sensor which takes <= 5 seconds to shut down
  could be respawned before it exited. (bug fix) #2187 [Kale Blankenship]
• Add missing entry for st2notifier service to the logrotate config. (bug fix)
• Allow action parameter values who's type is object to contain special characters such as
  . and $ in the parameter value. (bug fix, improvement)
• Allow user to specify URL which Mistral uses to talk to StackStorm API using mistral.api_url
  configuration option. If this option is not provided it defaults to the old behavior of using the
  public API url (auth.api_url setting). (improvement)