add an option to push/pull component images from a registry using kube-up

cluster/saltbase/salt/kube-apiserver/kube-apiserver.manifest

@@ -111,7 +111,7 @@
 "containers":[
     {
     "name": "kube-apiserver",
-    "image": "gcr.io/google_containers/kube-apiserver:{{pillar['kube-apiserver_docker_tag']}}",
+    "image": "{{pillar['kube_docker_registry']}}/kube-apiserver:{{pillar['kube-apiserver_docker_tag']}}",
     "resources": {
       "limits": {
         "cpu": "250m"

cluster/saltbase/salt/kube-controller-manager/kube-controller-manager.manifest

@@ -65,7 +65,7 @@
 "containers":[
     {
     "name": "kube-controller-manager",
-    "image": "gcr.io/google_containers/kube-controller-manager:{{pillar['kube-controller-manager_docker_tag']}}",
+    "image": "{{pillar['kube_docker_registry']}}/kube-controller-manager:{{pillar['kube-controller-manager_docker_tag']}}",
     "resources": {
       "limits": {
         "cpu": "200m"

cluster/saltbase/salt/kube-proxy/kube-proxy.manifest

@@ -25,7 +25,7 @@ spec:
   hostNetwork: true
   containers:
   - name: kube-proxy
-    image: gcr.io/google_containers/kube-proxy:{{pillar['kube-proxy_docker_tag']}}
+    image: {{pillar['kube_docker_registry']}}/kube-proxy:{{pillar['kube-proxy_docker_tag']}}
     command:
     - /bin/sh
     - -c

cluster/saltbase/salt/kube-scheduler/kube-scheduler.manifest

@@ -21,7 +21,7 @@
 "containers":[
     {
     "name": "kube-scheduler",
-    "image": "gcr.io/google_containers/kube-scheduler:{{pillar['kube-scheduler_docker_tag']}}",
+    "image": "{{pillar['kube_docker_registry']}}/kube-scheduler:{{pillar['kube-scheduler_docker_tag']}}",
     "resources": {
       "limits": {
         "cpu": "100m"