Delete Multiple Objects should be also RESTful as usual Delete
Update specs
Fix zero-size object copy failure
Fix wrong test
Wrong usage of Range
Merge pull request #903 from basho/bugfix/multi-delete-is-restful

Delete Multiple Objects should be also RESTful as usual Delete

Reviewed-by: shino
Merge pull request #904 from basho/bugfix/zero-size-copy-500

Fix zero-size object copy failure

Reviewed-by: shino
Update ceph/s3-tests to latest, modified to 1.5.0