Consul api doesn't provide token usage in Locking operation

Client: `0.8.3`

`func (l *Lock) Lock(stopCh <-chan struct{}) (<-chan struct{}, error) {`
.........
**`qOpts := &QueryOptions{
WaitTime: l.opts.LockWaitTime
}`**
........
`pair, meta, err := kv.Get(l.opts.Key, qOpts)`
`........`

But QueryOptions contain Token field

Start at the Lock.Lock function and its QueryOptions construction, then trace how the lock options expose token information. Check the related locking tests or add coverage for token usage; done means the token is supplied during the kv.Get operation and the behavior is verified.

Written by the indexing model from the issue text.