Remove envoy in make build target

Envoy build is causing atests to fail.
Do not build Envoy till root cause is fixed.

Change-Id: I626c2be49c094d662c55f7a42fce17f450cdb470
diff --git a/Makefile b/Makefile
index f640ab8..e6f69de 100644
--- a/Makefile
+++ b/Makefile
@@ -235,7 +235,7 @@
 
 prod-containers: base voltha ofagent netconf shovel onos dashd cli grafana consul tools envoy fluentd unum j2
 
-containers: base voltha ofagent netconf shovel onos tester config-push dashd cli portainer grafana nginx consul tools envoy fluentd unum ponsim j2 alarm-generator test_runner
+containers: base voltha ofagent netconf shovel onos tester config-push dashd cli portainer grafana nginx consul tools fluentd unum ponsim j2 alarm-generator test_runner
 
 base:
 	docker build $(DOCKER_BUILD_ARGS) -t ${REGISTRY}${REPOSITORY}voltha-base:${TAG} -f docker/Dockerfile.base .