CLOUDSTACK-3709: Add the missing file.
CLOUDSTACK-3709:[Object_Store_Refactor][UI] Can't delete NFS Cache
storage through UI.  Fixed at API side.

Conflicts:
	server/src/com/cloud/storage/StorageManagerImpl.java
Fix build break due to commit 2e0847bfe01e74f5c80e028b66aee74d7a07493f.