Move docker/devops-portal job to skip_voting mode

Change-Id: Ib7570dc84b02bba70ffc02d8ac71a51971b8bc85
diff --git a/jenkins/client/job/docker/devops-portal.yml b/jenkins/client/job/docker/devops-portal.yml
index 50f72a4..14735b6 100644
--- a/jenkins/client/job/docker/devops-portal.yml
+++ b/jenkins/client/job/docker/devops-portal.yml
@@ -22,6 +22,11 @@
                 "oss/devops-portal":
                   branches:
                     - master
+              skip_vote:
+                - successful
+                - failed
+                - unstable
+                - not_built
               event:
                 patchset:
                   - created: