Add unit tests for FailedStorage init from SharedStorage
Add unit tests for FailedStorage init from SharedStorage

sharidas/core,owncloud/core,sharidas/core,pollopolea/core,owncloud/core,sharidas/core,sharidas/core,owncloud/core,pollopolea/core,owncloud/core,pollopolea/core,pollopolea/core,phil-davis/core,sharidas/core,owncloud/core,pollopolea/core