Check api_interface instead of network_interface
Check api_interface instead of network_interface

Precheck tasks test network_interface configuration but services
run at api_interface. Also it makes more sense to start tests
in order "interfaces->addresses->per-service ports".

Change-Id: Iaf4c3cd08be1466b6c710b91653394f22947ee29
Closes-Bug: #1633503

stackforge/kolla,intel-onp/kolla,dardelean/kolla-ansible,coolsvap/kolla,nihilifer/kolla,openstack/kolla,GalenMa/kolla,openstack/kolla,rahulunair/kolla,dardelean/kolla-ansible,coolsvap/kolla,stackforge/kolla,rahulunair/kolla,intel-onp/kolla,mrangana/kolla,nihilifer/kolla,mrangana/kolla,GalenMa/kolla,coolsvap/kolla,dardelean/kolla-ansible,stackforge/kolla