Tests 'test_router_interfaces_with_update_firewall' and
'test_router_interfaces_different_tenants_update_firewall'
were indeterminately failing because comparsion between two lists
which are not sorted and the order of items in the list
depended on the router port list order, as it returns from the database query.
This patch fix this problem by sorting the return ports ciders list.
Signed-off-by: Roey Chen <roeyc@vmware.com>
Change-Id: I90c68f30ac43e7fe8c1f635d38bde08e418ed3b8