Add QoS support for neutron

Added "qos" option to enable qos support for openvswith and sriov.
Set qos false by default.

Depends-on change for reclass/system
https://gerrit.mcp.mirantis.net/#/c/5999

Change-Id: Ia2daf0024c5de56518ec6b5a1eac77d8fd9d5d4f
12 files changed