Comment 1 for bug 813112

This also happens for the same reason:

ensemble.providers.ec2.tests.test_launch.EC2MachineLaunchTest.test_launch_with_no_ensemble_s3_state
===============================================================================
[FAIL]
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/twisted/trial/unittest.py", line 402, in _eb
    raise self.failureException(output)
twisted.trial.unittest.FailTest:
Expected: (<class 'ensemble.errors.EnvironmentNotFound'>,)
Got:
[Failure instance: Traceback: <type 'exceptions.LookupError'>: SSH authorized/public key not found.
/«BUILDDIR»/ensemble-0.5+bzr277/ensemble/providers/ec2/tests/test_launch.py:268:test_launch_with_no_ensemble_zookeeper_hosts
/«BUILDDIR»/ensemble-0.5+bzr277/ensemble/providers/ec2/__init__.py:109:start_machine
/«BUILDDIR»/ensemble-0.5+bzr277/ensemble/providers/ec2/launch.py:36:run
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:1141:unwindGenerator
--- <exception caught here> ---
/usr/lib/python2.7/dist-packages/twisted/internet/defer.py:1020:_inlineCallbacks
/«BUILDDIR»/ensemble-0.5+bzr277/ensemble/providers/ec2/launch.py:205:launch
/«BUILDDIR»/ensemble-0.5+bzr277/ensemble/providers/common.py:76:get_user_authorized_keys
]