lockutils: do not grab the lock in creators
lockutils: do not grab the lock in creators

The functions used to create the lock should not grab it, as it is not
their roles to do so. Instead, the lock is acquired in the decorator
using these functions.

Change-Id: Ia6d550869ae1c60883658af1c385d49728b6cd60

JioCloud/oslo.concurrency,openstack/oslo.concurrency,varunarya10/oslo.concurrency