Signed-off-by: Nyhmo <yihua.mo@zilliz.com>

Signed-off-by: Ndragondriver <jiquan.long@zilliz.com>

* rename master/indexService in .yaml
Signed-off-by: Nyudong.cai <yudong.cai@zilliz.com>

* rename proxyNode to proxy in config files
Signed-off-by: Nyudong.cai <yudong.cai@zilliz.com>

* move master.yaml to root_coord.yaml, move proxy_node.yaml to proxy.yaml
Signed-off-by: Nyudong.cai <yudong.cai@zilliz.com>

* move proto/query_service.proto to proto/query_coord.proto
Signed-off-by: Nyudong.cai <yudong.cai@zilliz.com>

* move proxy_node_manager.go to proxy_manager.go
Signed-off-by: Nyudong.cai <yudong.cai@zilliz.com>

* add query_coord.pb.go
Signed-off-by: Nyudong.cai <yudong.cai@zilliz.com>

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

Signed-off-by: Nsunby <bingyi.sun@zilliz.com>

Signed-off-by: Nyudong.cai <yudong.cai@zilliz.com>
improve code coverage for distributed/dataservice

Now it's able to start multiple datanode, however, they will process the same insert data.
Further changes are needed to truly enable multiple datanode:

While registering, dataservice need to return different insert channels for different datanode.
Signed-off-by: Nyangxuan <xuan.yang@zilliz.com>

Signed-off-by: NXuanYang-cn <xuan.yang@zilliz.com>

Signed-off-by: Nzhenshan.cao <zhenshan.cao@zilliz.com>