Add VNI to VM network API list

Saves some processing on API clients.

api-daemon/pvcapid/flaskapi.py

@@ -1046,6 +1046,9 @@ class API_VM_Root(Resource):
                       source:
                         type: string
                         description: The parent network bridge on the node
+                      vni:
+                        type: integer
+                        description: The VNI (PVC network) of the network bridge
                       model:
                         type: string
                         description: The virtual network device model

daemon-common/common.py

@@ -27,6 +27,7 @@ import shlex
 import subprocess
 import kazoo.client
 from json import loads
+from re import match as re_match
 
 from distutils.util import strtobool
 
@@ -359,6 +360,7 @@ def getDomainNetworks(parsed_xml, stats_data):
             net_wr_drops = net_stats.get('wr_drops', 0)
             net_obj = {
                 'type': net_type,
+                'vni': re_match(r'[vm]*br([0-9a-z]+)', net_bridge).group(1),
                 'mac': net_mac,
                 'source': net_bridge,
                 'model': net_model,