Move FWaaS Noop driver to unit tests directory

[Sumit Naiksatam]

Per discussion during I summit, so as to avoid confusion and not be listed in providers.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/63066

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/63066
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=d7743bbdc3e992d9f9cceaeaa2919cd70b422364
Submitter: Jenkins
Branch: master

commit d7743bbdc3e992d9f9cceaeaa2919cd70b422364
Author: Sridar Kandaswamy <email address hidden>
Date: Thu Dec 19 00:04:25 2013 -0800

    Remove FWaaS Noop driver as default and move to unit tests dir

    Remove the FWaaS Noop driver as the default and raise an exception
    when the fwaas_driver.ini file has an enabled flag without any
    associated driver. This communicates a misconfiguration clearly.
    The Noop driver is moved to unit tests where it is used.
    Also some cleanups in related area.

    Closes-Bug: #1250841

    Change-Id: Ib6345923df05994ceffc0b1cbf265b53c23e97f1