title: Data factory: Trigger time using as a parameter in Relative URI in HTTP file datasets
body: <p>I have a REST source from where I am ingesting data. I have to trigger pipeline every 2am in the morning. So far so good. I have done this. But there is a parameter in Relative URI in which i have to put 'since time' in it. Basically it will send all the responses after "since time" (epoch time) hence its usability is significant.</p>
  
  <p>So suppose if I am triggering it today morning 2am then I have to set "since time" in relative URI as (current datetime - 1 day).</p>
  
  <p>Is there any way on how to use parameters of factory to accomplish this?</p>