Update notes for submitted changes

* Closes-Bug: #1349796 'virsh cpu-stats' command is not available on Ubuntu. Instead use 'virsh dominfo' to fetch cpu time as this command is available on both Ubuntu and Centos. Also fix command to fetch pid so that it works on both centos and ubuntu. Change-Id: I05f4b70a8621a90dd8899cdcf26205ff28f17b5d