i18n Error for message objects concatenation

[Madhu Mohan Nelemane]

Following error is seen on tests in some platforms. But it would be better to fix it in general.

     Traceback (most recent call last):
       File "/home/abuild/rpmbuild/BUILD/python-openstackclient-2.2.1.dev189/openstackclient/tests/common/test_clientmanager.py", line 345, in test_client_manager_select_auth_plugin_failure
         client_manager.setup_auth,
       File "/usr/lib/python2.7/site-packages/testtools/testcase.py", line 420, in assertRaises
         self.assertThat(our_callable, matcher)
       File "/usr/lib/python2.7/site-packages/testtools/testcase.py", line 431, in assertThat
         mismatch_error = self._matchHelper(matchee, matcher, message, verbose)
       File "/usr/lib/python2.7/site-packages/testtools/testcase.py", line 481, in _matchHelper
         mismatch = matcher.match(matchee)
       File "/usr/lib/python2.7/site-packages/testtools/matchers/_exception.py", line 108, in match
         mismatch = self.exception_matcher.match(exc_info)
       File "/usr/lib/python2.7/site-packages/testtools/matchers/_higherorder.py", line 62, in match
         mismatch = matcher.match(matchee)
       File "/usr/lib/python2.7/site-packages/testtools/testcase.py", line 412, in match
         reraise(*matchee)
       File "/usr/lib/python2.7/site-packages/testtools/matchers/_exception.py", line 101, in match
         result = matchee()
       File "/usr/lib/python2.7/site-packages/testtools/testcase.py", line 965, in __call__
         return self._callable_object(*self._args, **self._kwargs)
       File "/home/abuild/rpmbuild/BUILD/python-openstackclient-2.2.1.dev189/openstackclient/common/clientmanager.py", line 154, in setup_auth
         required_scope=required_scope)
       File "/home/abuild/rpmbuild/BUILD/python-openstackclient-2.2.1.dev189/openstackclient/api/auth.py", line 148, in check_valid_auth_options
         msg += _('Set a username with --os-username, OS_USERNAME,'
       File "/usr/lib/python2.7/site-packages/oslo_i18n/_message.py", line 233, in __radd__
         return self.__add__(other)
       File "/usr/lib/python2.7/site-packages/oslo_i18n/_message.py", line 230, in __add__
         raise TypeError(msg)
     TypeError: Message objects do not support addition.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/310537

[Steve Martinelli (stevemar)]

how are you running the tests?

[Guang Yee (guang-yee)]

I got the same traceback simply by running tox.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/310537
Committed: https://git.openstack.org/cgit/openstack/python-openstackclient/commit/?id=a4d4e81c88da400d4ec62fb9fdc00eeeafafc0e5
Submitter: Jenkins
Branch: master

commit a4d4e81c88da400d4ec62fb9fdc00eeeafafc0e5
Author: Madhu Mohan Nelemane <email address hidden>
Date: Wed Apr 27 18:43:57 2016 +0200

    Avoid TypeError on message object additions

    Change-Id: I634c1e158e93eeb55ab17fef8a0715b6678dffec
    Closes-Bug: #1575787

[Doug Hellmann (doug-hellmann)]

This issue was fixed in the openstack/python-openstackclient 2.5.0 release.