"Already has an action" is frustrating for the user when trying to delete an in-progress stack

[Clint Byrum]

After creating a stack and have it stall, I tried to delete it, but got this error from python-heatclient:

Traceback (most recent call last):
  File "/opt/stack/venvs/heat/local/lib/python2.7/site-packages/eventlet/wsgi.py", line 384, in handle_one_response
    result = self.application(self.environ, start_response)
  File "/opt/stack/venvs/heat/local/lib/python2.7/site-packages/webob/dec.py", line 130, in __call__
    resp = self.call_func(req, *args, **self.kwargs)
  File "/opt/stack/venvs/heat/local/lib/python2.7/site-packages/webob/dec.py", line 195, in call_func
    return self.func(req, *args, **kwargs)
  File "/opt/stack/venvs/heat/local/lib/python2.7/site-packages/heat/common/wsgi.py", line 306, in __call__
    response = req.get_response(self.application)
  File "/opt/stack/venvs/heat/local/lib/python2.7/site-packages/webob/request.py", line 1296, in send
    application, catch_exc_info=False)
  File "/opt/stack/venvs/heat/local/lib/python2.7/site-packages/webob/request.py", line 1260, in call_application
    app_iter = application(self.environ, start_response)
  File "/opt/stack/venvs/heat/local/lib/python2.7/site-packages/keystoneclient/middleware/auth_token.py", line 461, in __call__
    return self.app(env, start_response)
  File "/opt/stack/venvs/heat/local/lib/python2.7/site-packages/webob/dec.py", line 130, in __call__
    resp = self.call_func(req, *args, **self.kwargs)
  File "/opt/stack/venvs/heat/local/lib/python2.7/site-packages/webob/dec.py", line 195, in call_func
    return self.func(req, *args, **kwargs)
  File "/opt/stack/venvs/heat/local/lib/python2.7/site-packages/heat/common/wsgi.py", line 306, in __call__
    response = req.get_response(self.application)
  File "/opt/stack/venvs/heat/local/lib/python2.7/site-packages/webob/request.py", line 1296, in send
    application, catch_exc_info=False)
  File "/opt/stack/venvs/heat/local/lib/python2.7/site-packages/webob/request.py", line 1260, in call_application
    app_iter = application(self.environ, start_response)
  File "/opt/stack/venvs/heat/local/lib/python2.7/site-packages/webob/dec.py", line 144, in __call__
    return resp(environ, start_response)
  File "/opt/stack/venvs/heat/local/lib/python2.7/site-packages/routes/middleware.py", line 131, in __call__
    response = self.app(environ, start_response)
  File "/opt/stack/venvs/heat/local/lib/python2.7/site-packages/webob/dec.py", line 144, in __call__
    return resp(environ, start_response)
  File "/opt/stack/venvs/heat/local/lib/python2.7/site-packages/webob/dec.py", line 130, in __call__
    resp = self.call_func(req, *args, **self.kwargs)
  File "/opt/stack/venvs/heat/local/lib/python2.7/site-packages/webob/dec.py", line 195, in call_func
    return self.func(req, *args, **kwargs)
  File "/opt/stack/venvs/heat/local/lib/python2.7/site-packages/heat/common/wsgi.py", line 612, in __call__
    raise translate_exception(err, request.best_match_language())
ActionInProgress_Remote: Stack bignested already has an action (CREATE) in progress
Traceback (most recent call last):

  File "/opt/stack/venvs/heat/local/lib/python2.7/site-packages/heat/openstack/common/rpc/amqp.py", line 435, in _process_data
    **args)

  File "/opt/stack/venvs/heat/local/lib/python2.7/site-packages/heat/openstack/common/rpc/dispatcher.py", line 172, in dispatch
    result = getattr(proxyobj, method)(ctxt, **kwargs)

  File "/opt/stack/venvs/heat/local/lib/python2.7/site-packages/heat/engine/service.py", line 55, in wrapped
    return func(self, ctx, *args, **kwargs)

  File "/opt/stack/venvs/heat/local/lib/python2.7/site-packages/heat/engine/service.py", line 389, in delete_stack
    self.stg[st.id].stop()

ActionInProgress: Stack bignested already has an action (CREATE) in progress

Restarting heat-engine got rid of the error, but it should never have shown up in the first place IMO. Delete means you want to get rid of it. So we should queue it up and do it if the user has requested it and we can't quite make it happen right away.

[Steven Hardy (shardy)]

Dupe of https://bugs.launchpad.net/heat/+bug/1211276 AFAICT?