Rename default storageclasses

From UX perspective, 'default' is a bad name for the default storage class:

$ kubectl get storageclass
NAME            TYPE
default (default)   kubernetes.io/aws-ebs

This is sort of OK, it gets more confusing when user is not happy with the
preinstalled default storage class and creates its own and makes it default:

NAME             TYPE
default          kubernetes.io/aws-ebs
iops (default)   kubernetes.io/aws-ebs

cluster/addons/storage-class/aws/default.yaml

@@ -1,7 +1,7 @@
 apiVersion: storage.k8s.io/v1beta1
 kind: StorageClass
 metadata:
-  name: default
+  name: gp2
   annotations:
     storageclass.beta.kubernetes.io/is-default-class: "true"
   labels:

cluster/addons/storage-class/azure/default.yaml

@@ -1,7 +1,7 @@
 apiVersion: storage.k8s.io/v1beta1
 kind: StorageClass
 metadata:
-  name: default
+  name: standard
   annotations:
     storageclass.beta.kubernetes.io/is-default-class: "true"
   labels:

cluster/addons/storage-class/gce/default.yaml

@@ -1,7 +1,7 @@
 apiVersion: storage.k8s.io/v1beta1
 kind: StorageClass
 metadata:
-  name: default
+  name: standard
   annotations:
     storageclass.beta.kubernetes.io/is-default-class: "true"
   labels:

cluster/addons/storage-class/openstack/default.yaml

@@ -1,7 +1,7 @@
 apiVersion: storage.k8s.io/v1beta1
 kind: StorageClass
 metadata:
-  name: default
+  name: standard
   annotations:
     storageclass.beta.kubernetes.io/is-default-class: "true"
   labels:

cluster/addons/storage-class/vsphere/default.yaml

@@ -1,7 +1,7 @@
 apiVersion: storage.k8s.io/v1beta1
 kind: StorageClass
 metadata:
-  name: default
+  name: thin
   annotations:
     storageclass.beta.kubernetes.io/is-default-class: "true"
   labels: