remove policy checks in port_security tests

[Aaron Rosen]

This checks are no longer needed as they are done in the policy engine now.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/38239

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/38239
Committed: http://github.com/openstack/neutron/commit/9b0ccf6125809a5a568926101a04b52ed69a269d
Submitter: Jenkins
Branch: master

commit 9b0ccf6125809a5a568926101a04b52ed69a269d
Author: Aaron Rosen <email address hidden>
Date: Mon Jul 22 18:33:10 2013 -0700

    remove policy checks in port_security tests

    This patch removes the unneeded policy checks in the port_security_tests
    that are now done in the policy engine.

    Fixes bug: 1203925

    Change-Id: Iee8a2f4e8a8fdbb5e070b4bab78f7c6ba21daba1