Updating import path for DVRInfo.js in multiple files.

Instead, it must be
<script src="app/js/streaming/vo/metrics/DVRInfo.js"></script>
 
Also I think the script must be added to some other html pages:
\samples\ad-insertion\adinsertion_inband.html
\samples\ad-insertion\adinsertion_inline.html
\test\js\utils\DashUtil.html