fix: 更新restagent为omc

lib/config/config.go

@@ -483,7 +483,7 @@ func ReadTestConfigYaml(pfile string) (ret error) {
 }
 
 func GetDefaultUserAgent() string {
-	return "OMC-restagent/" + global.Version
+	return "OMC/" + global.Version
 }
 
 func GetOMCHostUrl() string {