Added a decode method to DiskResourceServiceFacadeImpl.

Returns an instance of the given class decoded from the given payload string, using the facade's DiskResourceAutoBeanFactory.
This method is complimentary to the facade's encode method.
CORE-4600 Refactor moveDiskResources to cache results.

Added a DiskResourceMove AutoBean interface for move requests and responses.
Refactored DiskResourceServiceFacade#moveDiskResources to use the new AutoBean for requests and responses.
Added a DiskResourceServiceFacadeImpl#moveFolders method for updating cached folders moved in DiskResourceMove responses.