test against a literal string, so we can see the expected string on failure

This let us figure out what happened here:
http://www.cpantesters.org/cpan/report/338ba54e-70b0-11e4-adde-df4e5fa3639d
eliminate a prereq by removing the few remaining uses of Moose::Autobox
avoid "use ExtUtils::MakeMaker 0;" -- as in [MakeMaker] 5.024
Dist-Zilla-Plugin-MakeMaker-Awesome-0.32

   - eliminated all uses of Moose::Autobox
   - avoid ever requiring v0 of ExtUtils::MakeMaker