fix(Makefile,.travis.yml): switch back to use DEV_REGISTRY

and specify it in the travis file

Author: Aaron Schlesinger

.travis.yml

@@ -5,6 +5,8 @@ branches:
 cache:
   directories:
     - vendor
+env:
+  DEV_REGISTRY=quay.io
 services:
   - docker
 sudo: required

Makefile

@@ -20,7 +20,7 @@ IMAGE_PREFIX ?= deis
 # Docker Root FS
 BINDIR := ./rootfs
 
-DEIS_REGISTRY ?= quay.io/
+DEIS_REGISTRY ?= ${DEV_REGISTRY}/
 
 # Kubernetes-specific information for RC, Service, and Image.
 RC := manifests/deis-${SHORT_NAME}-rc.yaml