Add NONINTERACTIVE_TESTING to CPANPLUS::YACSmoke

As per the Lancaster Consensus:

'The Lancaster Consensus from this year's QA hackathon has updated the
desired semantics:
http://www.dagolden.com/index.php/2098/the-annotated-lancaster-consensus/

Specifically, AUTOMATED_TESTING is now intended to distinguish only
between things running for "smoke testing" versus things running as
part of module installation (or other, manually testing).  It no
longer means "without recourse to a human operator" as it did after
the Oslo Consensus.  That aspect is now covered by the new
"NONINTERACTIVE_TESTING" environment variable.' -xdg
Fix POD errors in CPANPLUS::YACSmoke::IniFiles