title: how to disable build in Jenkins master
body: <p>I have setup Jenkins slave in AWS ECS, when jenkins have a build job, it will start a container in ECS instance, when the build job completed, the container will be gone. I want to disable build in Jenkins master to force user build in slave.
  I tried to set "# of executors"=0 in Configure System, but all the build job pending, it not go to slave to build. do you have a idea about this?
  Thanks.</p>