Parametrize packer upload url

Change-Id: I9ff518967cebbd0decf2b518ffbe88c112c6bedd
diff --git a/jenkins/client/job/image/ubuntu.yml b/jenkins/client/job/image/ubuntu.yml
index 350d2d7..c5b43d6 100644
--- a/jenkins/client/job/image/ubuntu.yml
+++ b/jenkins/client/job/image/ubuntu.yml
@@ -45,7 +45,7 @@
               default: ""
             UPLOAD_URL:
               type: string
-              default: "http://jenkins:eyoocaiG3ADireK3Eef8gae1roh5oox0@10.10.100.85:8088/"
+              default: "${_param:jenkins_packer_upload_url}"
             SKIP_UPLOAD:
               type: boolean
               default: "false"