Fixed goroutine leak in tests/integration/v3_watch_restore_test.go
Fixed goroutine leak in tests/integration/v3_watch_restore_test.go

Signed-off-by: VladSaioc <2c7cd7f72de40cb168fe20b2cb5eb2648bac3bbf@gmail.com>

ajityagaty/etcd,ajityagaty/etcd,etcd-io/etcd,etcd-io/etcd,etcd-io/etcd,mqliang/etcd,mqliang/etcd,mqliang/etcd,ajityagaty/etcd