The following patch implements the QoS egress minimum
bandwidth assurance in neutronclient.
Change-Id: I025522f73a9a8e3a9f69f097cedaeba330b9914a
Depends-On: I6b619a96a2bfde164646c71409b671352bc6ce7d
Depends-On: I13c54be22f35ac7eb5835d8424a919d0b61a8e95
Partial-Bug: #1560963