add test cases for object lock.
add test cases for object lock.

Signed-off-by: zhang Shaowen <8f5f9acb736a5d4d71a948f8a6cc0c663ef82964@cmss.chinamobile.com>

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