auto scaling policy doen't give a nice error on a bogus groupname

[Angus Salkeld]

If you manually give the groupname on the autoscaling policy the signal will produce a weird exception:

curl: (6) Could not resolve host: curl; Name or service not known
<ErrorResponse><Error><Message>The request processing has failed due to an internal error:Remote error: ResourceFailure AttributeError: 'NoneType' object has no attribute 'name'
[u'Traceback (most recent call last):\n', u' File "/home/asalkeld/work/heat/heat/openstack/common/rpc/amqp.py", line 462, in _process_data\n **args)\n', u' File "/home/asalkeld/work/heat/heat/openstack/common/rpc/dispatcher.py", line 172, in dispatch\n result = getattr(proxyobj, method)(ctxt, **kwargs)\n', u' File "/home/asalkeld/work/heat/heat/engine/service.py", line 60, in wrapped\n return func(self, ctx, *args, **kwargs)\n', u' File "/home/asalkeld/work/heat/heat/engine/service.py", line 644, in resource_signal\n stack[resource_name].signal(details)\n', u' File "/home/asalkeld/work/heat/heat/engine/resource.py", line 850, in signal\n raise failure\n', u"ResourceFailure: AttributeError: 'NoneType' object has no attribute 'name'\n"].</Message><Code>InternalFailure</Code><Type>Server</Type></Error></ErrorResponse>

[Angus Salkeld (asalkeld)]

We should at least produce a more meaningful error.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/61607

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/61607
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=15e2fed46a25663d779849480321caba4d67eece
Submitter: Jenkins
Branch: master

commit 15e2fed46a25663d779849480321caba4d67eece
Author: Angus Salkeld <email address hidden>
Date: Mon Dec 16 11:41:46 2013 +1100

    Improve autoscaling error message

    If we can't find the autoscaling group name produce a more
    meaningful error message.

    Change-Id: Id7ecae67c9ca8eca0c45b365e9a58caee212c2c9
    Closes-bug: #1260111