title: find last merge done to a branch clearcase
body: <p>I have two integration branch <code>int_1</code> and <code>int_2</code>.<br>
  In the time there has always been merged from <code>int_1</code> to <code>int_2</code>.   </p>
  
  <p>I want to know when was the last time a merge was done on <code>int_2</code> branch from <code>int_1</code> branch.<br>
  Is there any command to do that?</p>