pcp updates - minor pmrep tweak to use pmGetConfig

"Mark Goodwin" <[email protected]>
Newsgroups gmane.comp.sysutils.pcp
Message-ID <[email protected]> 
Changes committed to git://git.pcp.io/mgoodwin/pcp master

commit ef22a29f3c88c8bd2c253b71342fc161668a0799
Author: Mark Goodwin <[email protected]>
Date:   Wed Nov 16 11:01:54 2016 +1100

    pmrep: use pmGetConfig for PCP config settings

    Use the @static pmapi.pmContext.pmGetConfig() method rather than relying
    on the environment directly.
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