Heat add action on autoscaling signal to events but actually no action is performed

[Oleksii Chuprykov]

If we send action to autoscaling group that is in cooldown, heat add event in status SIGNAL_COMPLETE to event list, but actually doesn't perform any action.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/215080

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/215080
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=a976c63e4ec7d3ca36efb738e4778a94444f705f
Submitter: Jenkins
Branch: master

commit a976c63e4ec7d3ca36efb738e4778a94444f705f
Author: Oleksii Chuprykov <email address hidden>
Date: Tue Aug 25 16:03:01 2015 +0300

    Raise exception if asg in cooldown

    The signal() method of resource class doesn't add
    event to event list if the signal can not be performed i.e.
    handle_signal raise exception. So it is needed to raise exception
    if asg in cooldown. Otherwise the event will be added to event list
    in SIGNAL_COMPLETE state, but no action will be performed.

    Change-Id: Iebdb6c9231aef90d11428ca6beed150cfba2715f
    Closes-Bug: #1486945