ONOS-6717 Meter Protobuf model

Change-Id: I0cba2811957ce9cab370c229fbdfa61712635d69
diff --git a/incubator/protobuf/models/src/main/proto/net/meter/MeterEventProto.proto b/incubator/protobuf/models/src/main/proto/net/meter/MeterEventProto.proto
new file mode 100644
index 0000000..54ad1cc
--- /dev/null
+++ b/incubator/protobuf/models/src/main/proto/net/meter/MeterEventProto.proto
@@ -0,0 +1,13 @@
+syntax = "proto3";
+option java_package = "org.onosproject.grpc.net.meter.models";
+
+package net.meter;
+
+import "net/meter/MeterEnumsProto.proto";
+import "net/meter/MeterProto.proto";
+
+// Corresponds to org.onosproject.net.meter.MeterEvent.
+message MeterNotificationProto {
+    MeterEventTypeProto type = 1;
+    MeterProto meter = 2;
+}
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