move multi_region_enabled() into util class

Moving a helper function into a more general
location so that it can be used by other
classes.

Signed-off-by: Joe Buck <jbbuck@gmail.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
radosgw-agent: store radosgw_agent server/port

Persist the hostname and port number used
by the radosgw-agent http server.

Signed-off-by: Joe Buck <jbbuck@gmail.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
rgw: persist the region info

The rgw task deletes the region info
from the config structure. The s3tests
task needs this info, so we persist
it by sticking it in the ctx object.

Signed-off-by: Joe Buck <jbbuck@gmail.com>
Reviewd-by: Josh Durgin <josh.durgin@inktank.com>
s3tests: extend for multi-region tests

Added code to the s3tests task to extract
multi-region info so that that data
can be added to the S3TEST_CONF file
used to run S3 tests.

Signed-off-by: Joe Buck <jbbuck@gmail.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>