Comment 5 for bug 1665851

Reviewed: https://review.openstack.org/458884
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=84d61316ed552217698f2db9c271ddbbccf93058
Submitter: Jenkins
Branch: stable/newton

commit 84d61316ed552217698f2db9c271ddbbccf93058
Author: rabi <email address hidden>
Date: Tue Sep 27 16:52:22 2016 +0530

    Don't use oslo-incubator in glance client plugin

    There is plan to remove all oslo incubator code from the
    clients. This removes the usage of deprecated
    openstack.common.apiclient.exceptions in glance client
    plugin.

    The available glance HTTPNotFound exception is not usable
    for validations(no message) and there is no UniqueMatch
    exception.

    This adds a new custom client_exception module with two
    exceptions to ensure that the error messages remain the
    same as before.

    Closes-bug: #1665851

    Change-Id: I5b32eef047a1fe38382f649532c8bb8a910315e5
    (cherry picked from commit e1237f48effcd074f080090232561b0e5f550249)