Unicode error when assertMessageCount() fails

[Julie Pichon]

If setting assertMessageCount() to the wrong count (for instance, assertMessageCount(res, error=2) when only 1 message is expected), it fails with the following error:

  File "/home/jpichon/devel/horizon/horizon/test/helpers.py", line 166, in assertMessageCount
    ", ".join(msgs))
 TypeError: sequence item 0: expected string, __proxy__ found

[Openstack Gerrit (openstack-gerrit)]

Fix proposed to branch: master
Review: https://review.openstack.org/91580

[Openstack Gerrit (openstack-gerrit)]

Reviewed: https://review.openstack.org/91580
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=ed9faf84d188fce23c9f5c15f656011f544e88af
Submitter: Jenkins
Branch: master

commit ed9faf84d188fce23c9f5c15f656011f544e88af
Author: Julie Pichon <email address hidden>
Date: Thu May 1 15:50:32 2014 +0100

    Fix unicode error when assertMessageCount() fails

    When assertMessageCount() fails, we display the list of messages that
    were included in the response. However because the messages are lazily
    translated by default, this would fail and show the following error
    instead:

     TypeError: sequence item 0: expected string, __proxy__ found

    Change-Id: I1d2ed97b66428e0ee1aac783c8370ab3ea665b29
    Closes-Bug: #1315031