VOL-1405 : First submission for read-only core

- Most of the logic was copied from the read-write implementation
- Added missing Get/List calls
- Added necessary targets in Makefile
- Added docker and k8s manifests

Amendments:

- Removed more unecessary code.
- Removed refs to kafka
- Adjustements to reflect comments
- Removed refs to kafka in manifests

Change-Id: Ife2ca13d3ae428923825f7c19d42359d60406839
diff --git a/compose/ro_core.yml b/compose/ro_core.yml
new file mode 100644
index 0000000..d23013c
--- /dev/null
+++ b/compose/ro_core.yml
@@ -0,0 +1,38 @@
+---
+# Copyright 2018 the original author or authors.
+#
+# 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.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+version: '2'
+services:
+  ro_core:
+    image: voltha-ro-core
+    entrypoint:
+        - /app/ro_core
+        - -kv_store_type=etcd
+        - -kv_store_host=${DOCKER_HOST_IP}
+        - -kv_store_port=2379
+        - -grpc_port=50057
+        - -banner=true
+        - -ro_core_topic=rocore
+        - -log_level=0
+    ports:
+      - 50057:50057
+    volumes:
+    - "/var/run/docker.sock:/tmp/docker.sock"
+    networks:
+    - default
+
+networks:
+  default:
+    driver: bridge