This commit consists of:
1) Update the voltha.proto to remove duplicates between the voltha message and
the CoreInstance.   Since all data will be stored into the clustered KV store
then it makes sense to use a clustered proto message instead of core specific.
Each core will hold a subset of the data, only those it is actively or passively
managing.
2) Add a Makefile into the adapters directory to clearly separate the build of
adapters to the core build.   This is work in progress.
3) Add an initial readme.md into the adapters directory to show how to run ponsim
olt and onu adapters in containers
4) Minor cleanup, mostly around name consistency.

Change-Id: I55155c41b56e95877f8735b536873a87d6ca63b1
diff --git a/adapters/docker/Dockerfile.base b/adapters/docker/Dockerfile.base
index a50a3ee..1b912e0 100644
--- a/adapters/docker/Dockerfile.base
+++ b/adapters/docker/Dockerfile.base
@@ -20,7 +20,7 @@
 RUN apt-get update && \
     apt-get install -y python python-pip openssl iproute2 libpcap-dev wget
 
-COPY adapters/requirements.txt /tmp/requirements.txt
+COPY requirements.txt /tmp/requirements.txt
 
 # pip install cython enum34 six && \
 # Install app dependencies