py26 test target has deprecation warnings.

[manas kelshikar]

From py26 test log.

py26 create: /home/jenkins/workspace/gate-mistral-python26/.tox/py26
2014-03-27 00:30:37.242 | py26 installdeps: -r/home/jenkins/workspace/gate-mistral-python26/requirements.txt, -r/home/jenkins/workspace/gate-mistral-python26/test-requirements.txt
2014-03-27 00:32:45.035 | py26 develop-inst: /home/jenkins/workspace/gate-mistral-python26
2014-03-27 00:32:52.129 | py26 runtests: commands[0] | nosetests
2014-03-27 00:32:53.138 | /home/jenkins/workspace/gate-mistral-python26/.tox/py26/lib/python2.6/site-packages/sqlalchemy/engine/strategies.py:119: SADeprecationWarning: The 'listeners' argument to Pool (and create_engine()) is deprecated. Use event.listen().
2014-03-27 00:32:53.138 | pool = poolclass(creator, **pool_args)
2014-03-27 00:32:53.139 | /home/jenkins/workspace/gate-mistral-python26/.tox/py26/lib/python2.6/site-packages/sqlalchemy/pool.py:238: SADeprecationWarning: Pool.add_listener is deprecated. Use event.listen()
2014-03-27 00:32:53.139 | self.add_listener(l)
2014-03-27 00:32:53.328 | .../home/jenkins/workspace/gate-mistral-python26/mistral/tests/api/base.py:64: DeprecationWarning: BaseException.message has been deprecated as of Python 2.6
2014-03-27 00:32:53.329 | if hasattr(error, 'message'):
2014-03-27 00:32:53.329 | /home/jenkins/workspace/gate-mistral-python26/mistral/tests/api/base.py:65: DeprecationWarning: BaseException.message has been deprecated as of Python 2.6
2014-03-27 00:32:53.329 | self.assertIn('Bad response: 404 Not Found', error.message)
2014-03-27 00:32:53.377 | ../home/jenkins/workspace/gate-mistral-python26/mistral/tests/api/v1/controllers/test_executions.py:95: DeprecationWarning: BaseException.message has been deprecated as of Python 2.6
2014-03-27 00:32:53.377 | self.assertIn('Bad response: 400', context.exception.message)
2014-03-27 00:32:57.074 | ............................................S.S..................................

[Timur Nurlygayanov (tnurlygayanov)]

Fix available in https://review.openstack.org/#/c/83682/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/83682
Committed: https://git.openstack.org/cgit/stackforge/mistral/commit/?id=0b743fdd74cc5ba432a0f09c74b81eef384ba3ee
Submitter: Jenkins
Branch: master

commit 0b743fdd74cc5ba432a0f09c74b81eef384ba3ee
Author: TimurNurlygayanov <email address hidden>
Date: Fri Mar 28 11:46:02 2014 +0400

    Fixed issue with deprecated exception

    Change-Id: Ic2f1fec236f193fa4b07ebfd96e878d86cc6ad37
    Closes-Bug: #1298524