pcp updates - fix for qa/1121 tape instance ordering

"Mark Goodwin" <[email protected]> Thu, 16 Feb 2017 17:24:50 +1100

Newsgroups	gmane.comp.sysutils.pcp
Message-ID	<[email protected]>

Changes committed to git://git.pcp.io/mgoodwin/pcp master

commit ca13ab5dffade98d67c233a3c0056000afe9fc13
Author: Mark Goodwin <[email protected]>
Date:   Thu Feb 16 17:17:44 2017 +1100

    qa - add filter and sort to qa/1121 for tape metrics

    readdir order of fake sysfs root entries  depends on platform
    and filesystem on the QA system. So filter and sort pminfo output
    for consistency with the real sysfs order.