Remove the driver-level layer if creation fails
Remove the driver-level layer if creation fails

If we fail to save a record of a just-created driver-level layer,
attempt to delete it at the driver level before returning an the save
error.

Signed-off-by: Nalin Dahyabhai <f562fcb2a0b898bf0be1afc867ea92325d8f825f@redhat.com>

containers/storage,rhatdan/storage,rhatdan/storage,rhatdan/storage,containers/storage,containers/storage