Add exceptions

Change-Id: I5c63bf63338c0643a344cb8bfcc9e890c9b1c2a8
Fix tenant_id

Change-Id: Ib74415cbf0ec3a8e5eaa85c7154f47c131cbbc1a
OpenVSwitch QoS support

implements bp qos-ovs-qos

Change-Id: Ib0e2bed8763cbca8e75ced8b2ba57c7c548ff719