title: Is call-template synchronous in WSO2
body: <p>I'm quite new to wso2 and when using call-template I've the felling that my sequence is not called a synchronous way (the call-template is actually done in iterate mediation with sequential="true").
  Can someone confirm that call-template is synchronous and if not, how to make it synchronous.</p>
  
  <p>Thanks for helping</p>