test_dhcp_agent uses non-existant assert_called

[Mark McClain]

Some tests in test_dhcp_agent.py use a non-existent assert_called method. The bogus method was being called on a mock, so the error masked.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/12594

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/12594
Committed: http://github.com/openstack/quantum/commit/82d38c0ecd915bd7c4f5d4790253e6cc18858753
Submitter: Jenkins
Branch: master

commit 82d38c0ecd915bd7c4f5d4790253e6cc18858753
Author: Mark McClain <email address hidden>
Date: Fri Sep 7 14:52:12 2012 -0400

    remove incorrect mock assert_called in unit tests

    fixes bug 1047569

    The unit tests were calling a nonexistent assert_called() on the
    mocks. This patch fixes the problem by using the correct assert for
    checking that the mocked method was invoked.

    Note: This patch does not fix the error in test_call_driver() because a
    separate bug fix revises the test.

    Change-Id: Ie62e2e64f314f9ba34761e63cd5d0d6e44c5d094