title: Start new process in JBPM 6 with custom params
body: <p>i wanted to know how to start a process in JBPM 6.1.0.CR1 through REST passing a custom object. </p>
  
  <p>When i start a process through jbpm-console the form is displayed to input the data. Is there a way to pass the same data through a REST call ?</p>
  
  <p>My ultimate goal is to have a JMeter script fire up multiple processes in order to test the performance of the system.</p>
  
  <ul>
  <li><p>Even if passing custom objects is not feasible, i would like to know whether it is possible to pass primitive types (String, Integer etc) - even then i could construct my custom object after firing the process.</p></li>
  <li><p>I tried JBPM documentation but i cannot understand how to use query params and whether it applies in my scenario.</p></li>
  </ul>