Add backup testing scripts

backup-testing/change-storage-class.yaml

@@ -0,0 +1,23 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  # any name can be used; Velero uses the labels (below)
+  # to identify it rather than the name
+  name: change-storage-class-config
+  # must be in the velero namespace
+  namespace: velero
+  # the below labels should be used verbatim in your
+  # ConfigMap.
+  labels:
+    # this value-less label identifies the ConfigMap as
+    # config for a plugin (i.e. the built-in change storage
+    # class restore item action plugin)
+    velero.io/plugin-config: ""
+    # this label identifies the name and kind of plugin
+    # that this ConfigMap is for.
+    velero.io/change-storage-class: RestoreItemAction
+data:
+  # add 1+ key-value pairs here, where the key is the old
+  # storage class name and the value is the new storage
+  # class name.
+  longhorn: local-path