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
diff --git a/metadata/service/control/single.yml b/metadata/service/control/single.yml
index 24b5a2f..e0c16e1 100644
--- a/metadata/service/control/single.yml
+++ b/metadata/service/control/single.yml
@@ -13,6 +13,7 @@
       dns_domain: novalocal
       tunnel_type: vxlan
       security_groups_enabled: true
+      qos: false
       version: ${_param:neutron_version}
       bind:
         address: ${_param:single_address}