Update test_port_list_filter_by_ip pass conditions

This patchset updates the pass assertions to check that the created
port is in the list of ports returned, and that every port returned
has a matching fixed IP.

The check that all the ports in the response are from a single tenant
is retained, so this test is expected to sometimes fail if run with
admin credentials.

Change-Id: Ia20af71d031504aa08fc0ea92fd35cbc408edba3
Partial-Bug: #1840401
1 file changed