Currently test_list_containers tempest tests[1] would be failed.
It is becuase accept-ranges header does not exist. See ceph bug[2].
Rgw_swift_enforce_content_length assures Content-Length and
Accept-Ranges in dynamically generated account & container listings.
[1] tempest.api.object_storage.test_account_services.AccountTest.test_list_containers
[2] http://tracker.ceph.com/issues/21554
Related-Bug: #1783456
Change-Id: I9b5fcc361f0bc0e521302d2df1974aabf6f4a7e7