1. zone-id inclusiion in lock/unlock for mdlog and datalog
2. renewal of lock if the locker request lock again
3. modified lock_id param to locker-id

Signed-off-by: Babu Shanmugam <anbu@enovance.com>
With restful skeleton for replica log

Signed-off-by: Babu Shanmugam <anbu@enovance.com>