Typo in a unittest for allowed-address-pairs extension which may lead to false-positives

[Roey Chen]

http://git.openstack.org/cgit/openstack/neutron/tree/neutron/tests/unit/test_extension_allowedaddresspairs.py#n263

The right alias for the security-group extension is 'security-group' and not 'security-groups',
with this typo, the if block will be skipped and in most of the time will cause the test to pass but not for the right reason.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/140341
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=7c18d1191c79fcfe46b60b6e5d8f06a687c86688
Submitter: Jenkins
Branch: master

commit 7c18d1191c79fcfe46b60b6e5d8f06a687c86688
Author: Roey Chen <email address hidden>
Date: Tue Dec 9 05:57:33 2014 -0800

    Fixed test test_update_port_security_off_address_pairs

    This test checks that port-update fails with 409 return code when
    port-security is turned off on a port which contains address-pairs.
    The test had a typo ('security-groups' -> 'security-group') which would
    have cause it to produce false-positive.
    This change rewrites the test and eliminates the possibility of this
    false-positive to occurs.

    Change-Id: Ib54ad089872f28eb28a3d4d050ba0ee8fdc2bfe2
    Closes-Bug: #1400725
    Signed-off-by: Roey Chen <email address hidden>