Updated openstack/openstack
Project: openstack/neutron  1049fd657e832fd371a2e13a6f18f937c346544c

test_dhcp_agent: Fix no-op tests

Fix some uses of assertCalledOnceWith, which seems like a mistake of
assert_called_once_with.

Also, add a hacking check to prevent the mistake.

Closes-Bug: #1397184
Change-Id: I12d077e2724d52eff65d55aff1130fbbb69671b1