[Fullstack] Wait until min QoS and Queue registers are set in DB
[Fullstack] Wait until min QoS and Queue registers are set in DB

Wait until the minimum bandwidth Qos and Queue registers are set in
the OVS DB. In case of error, log the QoS and Queue registers present
at this moment.

Change-Id: Ifb2f731d7d04e237d4e47ba486169348684c8b78
Related-Bug: #1737892

mahak/neutron,mahak/neutron,openstack/neutron,mahak/neutron,openstack/neutron,openstack/neutron