(#13439) refactor spec helper for compatibility with both puppet 2.7 and master
(#13439) refactor spec helper for compatibility with both puppet 2.7 and
master

yadavnikhil/puppetlabs-stdlib,puppetlabs/puppetlabs-stdlib,DavidS/puppetlabs-stdlib,HelenCampbell/puppetlabs-stdlib,jbondpdx/puppetlabs-stdlib,fuel-infra/puppetlabs-stdlib