[VOL-1034, VOL-1035, VOL-1037] This commit consists of:
1) Implementation of inter-adapter communication using flows
as proxy message between an ONU and its parent OLT.
2) Update the protos to reflect the inter-adapter message structure
3) Cleanup the ponsim adapters to removed unsued references and
general cleanup.

Change-Id: Ibe913a80a96d601fed946d9b9db55bb8d4f2c15a
diff --git a/adapters/docker/Dockerfile.protos b/adapters/docker/Dockerfile.protos
index 27e3db4..db70d13 100644
--- a/adapters/docker/Dockerfile.protos
+++ b/adapters/docker/Dockerfile.protos
@@ -19,14 +19,15 @@
 FROM ${REGISTRY}${REPOSITORY}voltha-protoc:${TAG} as builder
 MAINTAINER Voltha Community <info@opennetworking.org>
 
-COPY adapters/protos/third_party/google/api/*.proto /protos/google/api/
-COPY adapters/docker/config/Makefile.protos /protos/google/api/Makefile.protos
+COPY protos/third_party/google/api/*.proto /protos/google/api/
+COPY docker/config/Makefile.protos /protos/google/api/Makefile.protos
+COPY protos/*.proto /protos/voltha/
+COPY docker/config/Makefile.protos /protos/voltha/Makefile.protos
+
 WORKDIR /protos
 RUN make -f google/api/Makefile.protos google_api
 RUN touch /protos/google/__init__.py /protos/google/api/__init__.py
 
-COPY protos/*.proto /protos/voltha/
-COPY adapters/docker/config/Makefile.protos /protos/voltha/Makefile.protos
 WORKDIR /protos/voltha
 RUN make -f Makefile.protos build