Separate downstream object.

language-agent/DiscoveryService.proto

@@ -23,7 +23,7 @@ option java_package = "org.apache.skywalking.apm.network.language.agent";
 option csharp_namespace = "SkyWalking.NetworkProtocol";
 
 import "Common.proto";
-import "../Downstream.proto";
+import "Downstream.proto";
 
 service InstanceDiscoveryService {
     rpc registerInstance (ApplicationInstance) returns (ApplicationInstanceMapping) {

language-agent/JVMMetricsService.proto

@@ -22,7 +22,7 @@ option java_multiple_files = true;
 option java_package = "org.apache.skywalking.apm.network.language.agent";
 option csharp_namespace = "SkyWalking.NetworkProtocol";
 
-import "../Downstream.proto";
+import "Downstream.proto";
 
 service JVMMetricsService {
     rpc collect (JVMMetrics) returns (Downstream) {

service-mesh-probe/service-mesh.proto

@@ -21,10 +21,8 @@ syntax = "proto3";
 option java_multiple_files = true;
 option java_package = "org.apache.skywalking.apm.network.servicemesh";
 
-import "../Downstream.proto";
-
 service ServiceMeshMetricService {
-    rpc collect(stream serviceMeshMetric) returns (Downstream) {
+    rpc collect(stream serviceMeshMetric) returns (MeshProbeDownstream) {
     }
 }
 
@@ -56,5 +54,5 @@ enum DetectPoint {
     proxy = 2;
 }
 
-message Downstream {
+message MeshProbeDownstream {
 }