test_s3: Add tests for additional canned acl support.

Corresponds to tracker issue 3667.

Signed-off-by: caleb miles <caleb.miles@inktank.com>
generate_objects: use rewind=True in upload_objects

Use the rewind=True argument when uploading objects to make
realistic.py's use of upload_objects compatible with boto>=2.4.1, which
will try to seek to the end of the fp if rewind is not True.
Merge pull request #5 from ceph/wip-migrate-test1

generate_objects: use rewind=True in upload_objects
Merge remote-tracking branch 'gh/next'