title: Configuring hudson so that only one build is executed at a time
body: <p>I have 2 jobs in my hudson.Now i want to configure my hudson in such a way that no 2 build should be executed parallely.Even if both builds are of different jobs it should not be executed in parallel.
  <br>
  At a time only one build (of any job) should execute and all others should go in hudson queue.
  How can i do so?</p>