* update timetickSync::UpdateTimeTick
Signed-off-by: Nyudong.cai <yudong.cai@zilliz.com>

* update dml_channels.go
Signed-off-by: Nyudong.cai <yudong.cai@zilliz.com>

* fix unittest
Signed-off-by: Nyudong.cai <yudong.cai@zilliz.com>

* remove ProduceAll and BroadcastAll
Signed-off-by: Nyudong.cai <yudong.cai@zilliz.com>