add generation of python *grpc files

Signed-off-by: uwe ottrembka <uwe.ottrembka@adtran.com>
Change-Id: I2fcbfeb78e3aedd36d6122c055fdcbe7719756b0
diff --git a/python/dmi/commons_pb2_grpc.py b/python/dmi/commons_pb2_grpc.py
new file mode 100644
index 0000000..2daafff
--- /dev/null
+++ b/python/dmi/commons_pb2_grpc.py
@@ -0,0 +1,4 @@
+# Generated by the gRPC Python protocol compiler plugin. DO NOT EDIT!
+"""Client and server classes corresponding to protobuf-defined services."""
+import grpc
+