This rather large update adds the following
- A golang build container used for building golang executables and/or
  containers.
- envoyd, a daemon process that creates and updates the envoy config
  file based on consul's KV store and forces envoy to reload the config
  as it changes.
- Dockerfile(s) and compose files that integrate envoy into the NBI call
  chain to load-balance device-to-core assignment.
- Several developer tools that help build and replace specific
  containers in a running cluster. This allows the build process to be
  separated from the run-time as it will be in production.
- NOTES: A command line needs to be added to envoyd because now the
  values are declared at the start of the file. This will be submitted
  in a subsequent commit along with a change toward a more object
  oriented implementation.

Addressed reviewer comments.
Addressed even more reviewr comments.
Change-Id: Ia2ec825d48d475398e501f396452fb0306673432
diff --git a/Makefile b/Makefile
index 1c85214..27f5147 100644
--- a/Makefile
+++ b/Makefile
@@ -22,7 +22,7 @@
 
 VENVDIR := venv-$(shell uname -s | tr '[:upper:]' '[:lower:]')
 
-.PHONY: $(DIRS) $(DIRS_CLEAN) $(DIRS_FLAKE8) flake8 docker-base voltha chameleon ofagent podder netconf shovel onos dashd vcli portainer grafana nginx consul registrator envoy
+.PHONY: $(DIRS) $(DIRS_CLEAN) $(DIRS_FLAKE8) flake8 docker-base voltha chameleon ofagent podder netconf shovel onos dashd vcli portainer grafana nginx consul registrator envoy golang envoyd
 
 # This should to be the first and default target in this Makefile
 help:
@@ -99,9 +99,9 @@
 
 jenkins-containers: docker-base voltha chameleon ofagent netconf consul registrator
 
-prod-containers: docker-base voltha chameleon ofagent netconf shovel dashd vcli grafana consul registrator envoy registry
+prod-containers: docker-base voltha chameleon ofagent netconf shovel dashd vcli grafana consul registrator envoy registry golang envoyd
 
-containers: docker-base voltha chameleon ofagent podder netconf shovel onos tester config-push dashd vcli portainer grafana nginx consul registrator tools envoy
+containers: docker-base voltha chameleon ofagent podder netconf shovel onos tester config-push dashd vcli portainer grafana nginx consul registrator tools golang envoyd envoy
 
 docker-base:
 	docker build -t cord/voltha-base -f docker/Dockerfile.base .
@@ -130,6 +130,12 @@
 envoy:
 	docker build -t voltha/envoy -f docker/Dockerfile.envoy .
 
+envoyd:
+	make -C envoy/go/envoyd
+
+golang:
+	docker build -t go-builder -f envoy/go/golang-builder/Dockerfile ./envoy/go/golang-builder
+
 netconf:
 	docker build -t cord/netconf -f docker/Dockerfile.netconf .