Remove test runner from cisco plugin, use tox instead

[Henry Gessau]

See notes from
https://review.openstack.org/#/c/27695/

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/32980

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/32980
Committed: http://github.com/openstack/quantum/commit/5586fc3973367bc2f702441bf368a6fc2b785670
Submitter: Jenkins
Branch: master

commit 5586fc3973367bc2f702441bf368a6fc2b785670
Author: HenryVIII <email address hidden>
Date: Thu Jun 13 20:03:20 2013 -0400

    Remove unit tests that are no longer run.

    A long time ago, quantum/tests/unit became the home for all unit
    tests, but these ones in the Cisco plugin directory got left
    behind. They have suffered bit-rot and need to be removed.

    Also:
    - Move the fake Nexus driver to new home.
    - Filed new bugs to track the task of improving unit test coverage of
      Cisco plugin code.

    Fixes: bug #1174311
    Change-Id: I372e24aebbe1804e5b6ce62984bfd76b030a44b1