Fix param

Change-Id: I6d60661768a7a9ad47bd13ad0bcce952ee92ef83
diff --git a/jenkins/client/job/docker/testing.yml b/jenkins/client/job/docker/testing.yml
index 78df826..3cdbe09 100644
--- a/jenkins/client/job/docker/testing.yml
+++ b/jenkins/client/job/docker/testing.yml
@@ -54,7 +54,7 @@
                 default: "{{dockerfile}}"
               REGISTRY_URL:
                 type: string
-                default: "${_param:docker_registry_url}"
+                default: "${_param:jenkins_docker_registry_url}"
               REGISTRY_CREDENTIALS_ID:
                 type: string
                 default: "${_param:jenkins_docker_registry_credentials}"