fwaas unit tests for the API extension are not runnable

[Sean M. Collins]

When running tox in the neutron-fwaas repo, none of the unit tests are executed under /tests/unit/extensions

When forcing it to run by overriding OS_TEST_PATH=./neutron_fwaas/tests/unit/extensions - the following error occurs.

scollins@Sean-Collins-MBPr15 ~/src/openstack/neutron-fwaas ⚡ » tox -e py27
py27 develop-inst-nodeps: /Users/scollins/src/openstack/neutron-fwaas
py27 runtests: PYTHONHASHSEED='483791098'
py27 runtests: commands[0] | sh tools/pretty_tox.sh
running testr
Traceback (most recent call last):
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/runpy.py", line 162, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/Users/scollins/src/openstack/neutron-fwaas/.tox/py27/lib/python2.7/site-packages/subunit/run.py", line 149, in <module>
    main()
  File "/Users/scollins/src/openstack/neutron-fwaas/.tox/py27/lib/python2.7/site-packages/subunit/run.py", line 145, in main
    stdout=stdout, exit=False)
  File "/Users/scollins/src/openstack/neutron-fwaas/.tox/py27/lib/python2.7/site-packages/testtools/run.py", line 171, in __init__
    self.parseArgs(argv)
  File "/Users/scollins/src/openstack/neutron-fwaas/.tox/py27/lib/python2.7/site-packages/unittest2/main.py", line 113, in parseArgs
    self._do_discovery(argv[2:])
  File "/Users/scollins/src/openstack/neutron-fwaas/.tox/py27/lib/python2.7/site-packages/testtools/run.py", line 211, in _do_discovery
    super(TestProgram, self)._do_discovery(argv, Loader=Loader)
  File "/Users/scollins/src/openstack/neutron-fwaas/.tox/py27/lib/python2.7/site-packages/unittest2/main.py", line 223, in _do_discovery
    self.test = loader.discover(self.start, self.pattern, self.top)
  File "/Users/scollins/src/openstack/neutron-fwaas/.tox/py27/lib/python2.7/site-packages/unittest2/loader.py", line 364, in discover
    raise ImportError('Start directory is not importable: %r' % start_dir)
ImportError: Start directory is not importable: '/Users/scollins/src/openstack/neutron-fwaas/neutron_fwaas/tests/unit/extensions'
Non-zero exit code (1) from test listing.
error: testr failed (3)
running=OS_STDOUT_CAPTURE=1 OS_STDERR_CAPTURE=1 OS_LOG_CAPTURE=1 ${PYTHON:-python} -m subunit.run discover -t ./ ${OS_TEST_PATH:-./neutron_fwaas/tests/unit} --list
The test run didn't actually run any tests
ERROR: InvocationError: '/bin/sh tools/pretty_tox.sh '

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/213927

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/213927
Committed: https://git.openstack.org/cgit/openstack/neutron-fwaas/commit/?id=d5652debef22ae607bcfeafaec95147c68f4c874
Submitter: Jenkins
Branch: master

commit d5652debef22ae607bcfeafaec95147c68f4c874
Author: Sean M. Collins <email address hidden>
Date: Mon Aug 17 19:01:52 2015 -0400

    Make tests/unit/extensions discoverable

    Change-Id: I49ebe1eeeed011254b865290a92cecf6fdca4456
    Closes-Bug: #1485795