Also remove the user's home storage from the storage table when deleting a user
Use Cache->clear to cleanup the filecache for removed users
Revert "Use Cache->clear to cleanup the filecache for removed users"

This reverts commit 5a5b6f187e719e6c0bac5e64c411eb74e6d28389.
Also clean up the filecache table when deleting a storage entry
Merge branch 'master' into remove-user-storage-entry
Merge pull request #6881 from owncloud/remove-user-storage-entry

Also remove the user's home storage from the storage table when deleting a user