VOL-1500 VOL-1475 Updated the remaining python containers in voltha-go to use pyvoltha and voltha-protos

Changed the build system to have separate flags for local pyvoltha and local protos.
Cleared out now unneeded python libraries and protos from voltha-go

PonSim was tested by launching the system-test-ponsim.yml and making sure the ponsim enables.
This was tested on docker-compose and k8s.
Let me know if there are other cases to test.

Change-Id: Ie2d5a19900fcfc93b96aba2981efb18fd9e649bb
diff --git a/python/docker/Dockerfile.ofagent b/python/docker/Dockerfile.ofagent
index dee28ed..564da05 100644
--- a/python/docker/Dockerfile.ofagent
+++ b/python/docker/Dockerfile.ofagent
@@ -15,35 +15,17 @@
 ARG REGISTRY=
 ARG REPOSITORY=
 
-FROM ${REGISTRY}${REPOSITORY}voltha-protos:${TAG} as protos
 FROM ${REGISTRY}${REPOSITORY}voltha-base:${TAG}
 
 MAINTAINER Voltha Community <info@opennetworking.org>
 
-# Install protoc version 3.0.0; this is not yet the supported
-# version on xenial, so we need to "backport" it
-RUN apt-get update && \
-    apt-get install -y zlib1g-dev wget && \
-    wget http://ftp.us.debian.org/debian/pool/main/p/protobuf/libprotoc10_3.0.0-9_amd64.deb && \
-    wget http://ftp.us.debian.org/debian/pool/main/p/protobuf/libprotobuf-lite10_3.0.0-9_amd64.deb && \
-    wget http://ftp.us.debian.org/debian/pool/main/p/protobuf/libprotobuf-dev_3.0.0-9_amd64.deb && \
-    wget http://ftp.us.debian.org/debian/pool/main/p/protobuf/libprotobuf10_3.0.0-9_amd64.deb && \
-    wget http://ftp.us.debian.org/debian/pool/main/p/protobuf/protobuf-compiler_3.0.0-9_amd64.deb && \
-    dpkg -i *.deb && \
-    protoc --version && \
-    rm -f *.deb
-
 # Bundle app source
-RUN mkdir -p /ofagent/ofagent/protos/third_party/google/api  && \
-        touch   /ofagent/__init__.py \
-                /ofagent/ofagent/protos/third_party/google/__init__.py \
-                /ofagent/ofagent/protos/third_party/google/api/__init__.py
+RUN mkdir /ofagent  && \
+        touch   /ofagent/__init__.py 
+
 ENV PYTHONPATH=/ofagent
-COPY common /ofagent/common
 COPY ofagent /ofagent/ofagent
 COPY pki /ofagent/pki
-COPY --from=protos /protos/voltha /ofagent/ofagent/protos
-COPY --from=protos /protos/google/api /ofagent/ofagent/protos/third_party/google/api
 
 ENTRYPOINT ["/usr/bin/dumb-init", "--"]