list-objects: add basic tests for encoding
list-objects: add basic tests for encoding

Fixes: https://tracker.ceph.com/issues/41870
Signed-off-by: Abhishek Lekshmanan <0731fdeb307910eeaae4e58897b7baaba45e054b@suse.com>

robbat2/s3-tests,andrewgaul/s3-tests,andrewgaul/s3-tests,ceph/s3-tests,ceph/s3-tests,robbat2/s3-tests