Comment 3 for bug 1395107

Reviewed: https://review.openstack.org/155613
Committed: https://git.openstack.org/cgit/openstack/trove/commit/?id=b64b7b5421e667ae6d499cf1276a1052a6924ad5
Submitter: Jenkins
Branch: master

commit b64b7b5421e667ae6d499cf1276a1052a6924ad5
Author: Mayuri Ganguly <email address hidden>
Date: Thu Feb 12 18:09:29 2015 -0800

    Provide more readable error message when swift is not installed

    When creating a backup with no swift, the error message is very
    general. Added an exception handler to provide a more meaningful
    error message.

    Closes-bug 1395107

    Change-Id: I7cdc9ddd29d094493ce652425addfa461138675f