run_tests.sh runs all tests even when one specifies a single test file

[Rushi Agrawal]

when one executes
./run_tests.sh cinder.tests.blah_test_file -N

The test runner first runs the tests from blah_test_file, and then continues with running _all_ the tests from cinder test suite

[John Griffith (john-griffith)]

While we're working on moving to testr and getting this fixed you can run individual tests directly with nosetests:
    nosetests --tests ./cinder/tests/test_my_test.py

and you can use pdb by adding:
    --pdb --nocapture

[John Griffith (john-griffith)]

Oh.. and by the way, since run_tests.sh is just a wrapper around all of this you can also put it all together there and do:

    ./run_tests.sh --pdb --nocapture --tests ./cinder/tests/test_hds.py

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/30491
Committed: http://github.com/openstack/cinder/commit/2be0b9c39c20bd3d0144abf84232f1b2043ca6e1
Submitter: Jenkins
Branch: master

commit 2be0b9c39c20bd3d0144abf84232f1b2043ca6e1
Author: John Griffith <email address hidden>
Date: Fri May 24 13:46:28 2013 -0600

    Hack run_tests.sh to work with single tests again.

    Even though we're moving to testr and this will eventually
    go away, we should maintain our ability to run and debug
    individual tests until the broader change is released.

    This just adds some text around the nosetests call
    to get us back where we were.

    Fixes bug: 1181996

    Change-Id: Id0082ca8954664679430cc602425b1fadd29151b