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.adapter_ponsim_onu b/python/docker/Dockerfile.adapter_ponsim_onu
index c8d19f8..e34483e 100644
--- a/python/docker/Dockerfile.adapter_ponsim_onu
+++ b/python/docker/Dockerfile.adapter_ponsim_onu
@@ -15,7 +15,6 @@
 ARG REGISTRY=
 ARG REPOSITORY=
 
-FROM ${REGISTRY}${REPOSITORY}voltha-protos:${TAG} as protos
 FROM ${REGISTRY}${REPOSITORY}voltha-base:${TAG}
 
 MAINTAINER Voltha Community <info@opennetworking.org>
@@ -23,20 +22,9 @@
 # Bundle app source
 RUN mkdir /voltha && touch /voltha/__init__.py
 ENV PYTHONPATH=/voltha
-COPY common /voltha/python/common/
-COPY adapters/common /voltha/python/adapters/common/
-COPY adapters/kafka /voltha/python/adapters/kafka
-COPY adapters/*.py /voltha/python/adapters/
 COPY adapters/ponsim_onu /voltha/python/adapters/ponsim_onu
 RUN touch /voltha/python/__init__.py
 RUN touch /voltha/python/adapters/__init__.py
 
-# Copy in the generated GRPC proto code
-COPY --from=protos /protos/voltha /voltha/python/protos
-COPY --from=protos /protos/google/api /voltha/python/protos/third_party/google/api
-COPY protos/third_party/__init__.py /voltha/python/protos/third_party
-RUN touch /voltha/python/protos/__init__.py
-RUN touch /voltha/python/protos/third_party/google/__init__.py
-
 # Exposing process and default entry point
-# CMD ["python", "/voltha/python/adapters/ponsim_onu/main.py"]
+CMD ["python", "/voltha/python/adapters/ponsim_onu/main.py"]