add a "minion" default user

create a default user in the templates rather than relying on whatever
is used in the underlying images, which may be "centos" or "fedora"
or "ec2-user" or something else.

fragments/kube-user.yaml

@@ -0,0 +1,10 @@
+#cloud-config
+system_info:
+  default_user:
+    name: minion
+    lock_passwd: true
+    gecos: Kubernetes Interactive User
+    groups: [wheel, adm, systemd-journal]
+    sudo: ["ALL=(ALL) NOPASSWD:ALL"]
+    shell: /bin/bash
+

kubecluster.yaml

@@ -178,6 +178,12 @@ resources:
       group: ungrouped
       config: {get_file: fragments/enable-services-master.sh}
 
+  kube_user:
+    type: "OS::Heat::SoftwareConfig"
+    properties:
+      group: ungrouped
+      config: {get_file: fragments/kube-user.yaml}
+
   kube_examples:
     type: "OS::Heat::SoftwareConfig"
     properties:
@@ -195,6 +201,7 @@ resources:
     properties:
       parts:
         - config: {get_resource: write_heat_params}
+        - config: {get_resource: kube_user}
         - config: {get_resource: configure_kubernetes}
         - config: {get_resource: enable_services}
         - config: {get_resource: configure_flannel}

kubenode.yaml

@@ -92,6 +92,12 @@ resources:
       group: ungrouped
       config: {get_file: fragments/configure-kubernetes-minion.sh}
 
+  kube_user:
+    type: "OS::Heat::SoftwareConfig"
+    properties:
+      group: ungrouped
+      config: {get_file: fragments/kube-user.yaml}
+
   docker_service:
     type: "OS::Heat::SoftwareConfig"
     properties:
@@ -121,6 +127,7 @@ resources:
     properties:
       parts:
         - config: {get_resource: write_heat_params}
+        - config: {get_resource: kube_user}
         - config: {get_resource: add_centos_to_docker}
         - config: {get_resource: configure_kubernetes_minion}
         - config: {get_resource: docker_service}