Comment 56 for bug 1559072

Reviewed: https://review.openstack.org/462204
Committed: https://git.openstack.org/cgit/openstack/python-cinderclient/commit/?id=b20d9fd6563c1ef295e8a260742f2b3e0b8ee327
Submitter: Jenkins
Branch: stable/newton

commit b20d9fd6563c1ef295e8a260742f2b3e0b8ee327
Author: Akira KAMIO <email address hidden>
Date: Tue Dec 6 14:10:38 2016 +0900

    Handle error response for webob>=1.6.0

    WebOb change https://github.com/Pylons/webob/pull/230 changed
    the way in which the error response body is formatted such that
    it's no longer a nested dict. So we have to handle both the
    old convention of an error message key to the response body error
    dict and the new way with just the error body dict.

    This was reported upstream:

    https://github.com/Pylons/webob/issues/235

    But given this was apparently implemented as a long-overdue change
    in WebOb the behavior is not likely to change.Handle error response for
    webob>=1.6.0

    Change-Id: I7d589415aa024588faf77c8234ac026110f6c3cd
    Closes-Bug: #1559072
    (cherry picked from commit 19befa69651a41534c7d25b1a0d3a0cd407afb44)