[VOL-1462] Sync data between two voltha cores in the same pair

This commit consists of the following updates:
1) Background data syncing between two cores after a transaction
is completed by one core.
2) Add transaction management to southbound APIs (adapter facing).
This is enabled got adapter registration only for now.
3) Fix an issue with flow decomposition
4) Add the rough-in to allow a packet to be send to an OFAgent
with a transaction ID.  Two cores can therefore send the same
packet and let the OFAgent discard the duplicate.  The work in
OFAgent remains.
5) Cleanups

Change-Id: Ibe9d75edb66cfd6a0954bdfeb16a7e7c8a3c53b6
diff --git a/compose/rw_core_concurrency_test.yml b/compose/rw_core_concurrency_test.yml
new file mode 100644
index 0000000..8f6f35e
--- /dev/null
+++ b/compose/rw_core_concurrency_test.yml
@@ -0,0 +1,71 @@
+---
+# Copyright 2019 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:
+  rw_core1:
+    image: voltha-rw-core
+    entrypoint:
+        - /app/rw_core
+        - -kv_store_type=etcd
+        - -kv_store_host=${DOCKER_HOST_IP}
+        - -kv_store_port=2379
+        - -grpc_port=50057
+        - -banner=true
+        - -kafka_adapter_host=${DOCKER_HOST_IP}
+        - -kafka_adapter_port=9092
+        - -kafka_cluster_host=${DOCKER_HOST_IP}
+        - -kafka_cluster_port=9092
+        - -rw_core_topic=rwcore
+        - -kv_store_data_prefix=service/voltha
+        - -in_competing_mode=true
+        - -timeout_long_request=3000
+        - -timeout_request=300
+        - -log_level=0
+    ports:
+      - 50057:50057
+    volumes:
+    - "/var/run/docker.sock:/tmp/docker.sock"
+    networks:
+    - default
+
+  rw_core2:
+    image: voltha-rw-core
+    entrypoint:
+      - /app/rw_core
+      - -kv_store_type=etcd
+      - -kv_store_host=${DOCKER_HOST_IP}
+      - -kv_store_port=2379
+      - -grpc_port=50057
+      - -banner=true
+      - -kafka_adapter_host=${DOCKER_HOST_IP}
+      - -kafka_adapter_port=9092
+      - -kafka_cluster_host=${DOCKER_HOST_IP}
+      - -kafka_cluster_port=9092
+      - -rw_core_topic=rwcore
+      - -kv_store_data_prefix=service/voltha
+      - -in_competing_mode=true
+      - -timeout_long_request=3000
+      - -timeout_request=300
+      - -log_level=0
+    ports:
+      - 50058:50057
+    volumes:
+      - "/var/run/docker.sock:/tmp/docker.sock"
+    networks:
+      - default
+networks:
+  default:
+    driver: bridge