Version-Release number of selected component (if applicable):
openshift/jenkins-1-rhel7  27fca1f9ef45

How reproducible:
always

Description of problem:
Can add several same build steps via "add build steps" in jenkins configure page, I think should control it

Steps to Reproduce:
1. logged in to openshift as a normal user and working with a project named wewang

2. Add the edit role to the default service account in the wewang project:
   $ oc policy add-role-to-user edit system:serviceaccount:wewang:default
   
3. create is in project wewang and deploy the Jenkins service
   $ oc new-app jenkins-ephemeral-template.json
   $oc get route
    NAME      HOST/PORT                                         PATH      SERVICE   LABELS                                INSECURE POLICY   TLS TERMINATION
    jenkins   jenkins-wewang.router.default.svc.cluster.local             jenkins   template=jenkins-ephemeral-template                     edge

4. Visit jenkins webpage and select job "OpenShift Sample" to Configure
   pull down "add build step", select "Check Deployment Success in openshift", will add the build step, do it again, can add it again


  Actual results:
   Can add duplicate  build steps  
  
 Expected results:
   Cannot add the same build steps