This commit consists of the following:
1) The kafka messaging proxy in Twisted python for adapters
2) Initial implementation and containerization of ponsim OLT adapter
and ponsim ONU adapter
3) Initial submission of request and response facade in both Twisted
python and Go Language
4) Initial implementation of device management and logical device management
in the Core
5) Update to the log module to allow dynamic setting of log level per
package using the gRPC API
6) Bug fixes and minor changes

Change-Id: Ia8f033da84cfd08275335bae9542802415e7bb0f
diff --git a/docker/Dockerfile.rw_core b/docker/Dockerfile.rw_core
index 0c6b79c..c2a78a3 100644
--- a/docker/Dockerfile.rw_core
+++ b/docker/Dockerfile.rw_core
@@ -1,7 +1,7 @@
 # -------------
 # Build stage
 
-FROM golang:alpine AS build-env
+FROM golang:1.9.2-alpine AS build-env
 
 # Install required packages
 RUN apk add --no-cache wget git make build-base protobuf protobuf-dev
@@ -32,7 +32,7 @@
 RUN sh /src/protos/build_protos.sh /src/protos
 
 # Build rw_core
-RUN cd $GOPATH/src/github.com/opencord/voltha-go/rw_core && go get -d ./... && rm -rf $GOPATH/src/github.com/coreos/etcd/vendor/golang.org/x/net/trace && go build -o /src/rw_core
+RUN cd $GOPATH/src/github.com/opencord/voltha-go/rw_core && go get -d ./... && rm -rf $GOPATH/src/go.etcd.io/etcd/vendor/golang.org/x/net/trace && go build -o /src/rw_core
 
 # -------------
 # Image creation stage