Merge branch '3.0' into develop

test/integrate/dubbo/go-client/go.mod

@@ -3,7 +3,11 @@ module github.com/apache/dubbo-go/test/integrate/dubbo/go-client
 go 1.13
 
 require (
-	github.com/apache/dubbo-go v1.5.6-rc2.0.20210405033601-abbd985fb785
+	// useless dubbo-go version number, it will be replaced when run by this Docker file: ../Dockerfile:
+	//```
+	// RUN test ${PR_ORIGIN_REPO} && go mod edit  -replace=github.com/apache/dubbo-go=github.com/${PR_ORIGIN_REPO}@${PR_ORIGIN_COMMITID} || go get -u github.com/apache/dubbo-go@develop
+	//```
+	github.com/apache/dubbo-go v1.5.5
 	github.com/apache/dubbo-go-hessian2 v1.9.1
 )
 

test/integrate/dubbo/go-server/go.mod

@@ -3,7 +3,11 @@ module github.com/apache/dubbo-go/test/integrate/dubbo/go-server
 go 1.13
 
 require (
-	github.com/apache/dubbo-go v1.5.6-rc2.0.20210405033601-abbd985fb785
+	// useless dubbo-go version number, it will be replaced when run by this Docker file: ../Dockerfile:
+	//```
+	// RUN test ${PR_ORIGIN_REPO} && go mod edit  -replace=github.com/apache/dubbo-go=github.com/${PR_ORIGIN_REPO}@${PR_ORIGIN_COMMITID} || go get -u github.com/apache/dubbo-go@develop
+	//```
+	github.com/apache/dubbo-go v1.5.5
 	github.com/apache/dubbo-go-hessian2 v1.9.1
 )