Reflect radosgw-agent option changes in teuthology

Signed-off-by: Christophe Courtaut <christophe.courtaut@gmail.com>
rgw: remove unused variables

Region name isn't needed for the new radosgw-agent
command line args.

Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
rgw: fix whitespace

Replace tabs with spaces and remove trailing spaces.

Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
internal: fix log for python 2.6

{} was introduced to format strings in 2.7

Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
radosgw-agent: move positional argument last

Other args are treated as positional after the first one.

Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
radosgw-agent: add metadata-only option to task config

Signed-off-by: Josh Durgin <josh.durgin@inktank.com>