(MAINT) fix up try_get_value acceptance test
(MAINT) fix up try_get_value acceptance test

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