SEBA-688 implement mock gRPC server and unit test the version command

Change-Id: Ia10a8ea5b00ce5d5100f8fffbefba96f234d4b32
diff --git a/mock/docker-compose.yml b/mock/docker-compose.yml
new file mode 100644
index 0000000..7ea5b5c
--- /dev/null
+++ b/mock/docker-compose.yml
@@ -0,0 +1,22 @@
+# Portions copyright 2019-present Open Networking Foundation
+# Original copyright 2019-present Ciena Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+
+version: '2'
+services:
+  mock-server:
+    container_name: xos-mock-grpc-server
+    build: .
+    ports:
+    - "50051:50051"
+    environment:
+    - DATA_JSON