Updated openstack/openstack
Project: openstack/python-swiftclient  7980704c33c478f73c353884f099550d6fcf853d

Fix misnamed dictionary key.

The response dictionary in _delete_segment attach's any error
it encounters to the dict key 'exception', all other response
dict's use 'error' to store the exception.

Changed to make it consistent and added tests

Also added a third branch in st_delete as messages
created in _delete_container where being silently dropped.

Change-Id: Ifbc3b1fae78910fbc6acf4a86cfb0f60bb1aa336