Comment 4 for bug 1279058

Reviewed: https://review.openstack.org/144989
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=28d9ba7de4cd90857eb647d88183b5e626ed7280
Submitter: Jenkins
Branch: master

commit 28d9ba7de4cd90857eb647d88183b5e626ed7280
Author: tengqm <email address hidden>
Date: Mon Jan 5 22:19:48 2015 +0800

    Deal with misconfigured cloud_backend

    In some rare cases, users may misconfigure 'cloud_backend' in heat.conf.
    The result is that Heat cannot properly import the configured
    module/object. This patch makes Heat throw exceptions that inform users
    of correct error messages and also log errors for operators.

    Closes-Bug: 1279058
    Change-Id: Ied0099f545b0af484aefc50f3d5932111ca3fd0b