ONOS-7251 - Initial implementation of fabric.p4 L2 broadcast feature.

Thrift client cherry-picked from the commit dd5792ac9ee38a702c3128a34224852b5c284687

Change-Id: I989f2b2074485a892195889a7c976b518510da88
diff --git a/tools/dev/mininet/bmv2.py b/tools/dev/mininet/bmv2.py
index c4ec15f..0c0fc15 100644
--- a/tools/dev/mininet/bmv2.py
+++ b/tools/dev/mininet/bmv2.py
@@ -145,6 +145,10 @@
                     "port": self.grpcPort,
                     "deviceId": BMV2_DEFAULT_DEVICE_ID,
                     "deviceKeyId": "p4runtime:%s" % self.onosDeviceId
+                },
+                "bmv2-thrift": {
+                    "ip": srcIP,
+                    "port": self.thriftPort
                 }
             },
             "piPipeconf": {