Use the wrong exceptions reference in domains panel

[wei.ying]

In the identity domain tables.py file, handling the message exception should use the file in horizon instead of keystoneclient.

As below:
https://github.com/openstack/horizon/blob/master/openstack_dashboard/dashboards/identity/domains/tables.py#L161
https://github.com/openstack/horizon/blob/master/openstack_dashboard/dashboards/identity/domains/tables.py#L201

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/479477

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/479477
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=4b2e5b574f3bbdf52018f7e920e26b02edf781fb
Submitter: Jenkins
Branch: master

commit 4b2e5b574f3bbdf52018f7e920e26b02edf781fb
Author: wei.ying <email address hidden>
Date: Sat Jul 1 15:33:08 2017 +0800

    Correct the wrong exceptions reference in domain tables.py

    This patch fixes a typo when referencing exception message handle
    function, the correct function should use the Horizon exceptions
    module instead of keystoneclient.

    Change-Id: Iaeabf3630351f13f6881b4df489c709fa3ef092f
    Closes-Bug: #1701782

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/horizon 12.0.0.0b3 development milestone.