Remove latest tag from defaults tag of image

Change-Id: I0a55031a5ee60ab9cd84971239b35ac7d109db1a
diff --git a/jenkins/client/job/docker/devops-portal.yml b/jenkins/client/job/docker/devops-portal.yml
index 14735b6..f817568 100644
--- a/jenkins/client/job/docker/devops-portal.yml
+++ b/jenkins/client/job/docker/devops-portal.yml
@@ -38,10 +38,10 @@
           param:
             IMAGE_NAME:
               type: string
-              default: "devops-portal"
+              default: "devops_portal"
             IMAGE_TAGS:
               type: string
-              default: "latest"
+              default: ""
             CREDENTIALS_ID:
               type: string
               default: "gerrit"