Add hiera5 default config file to puppet

Drop new hiera 5 compliant default files in {{confdir}} and {{env-directory}} Note Upgrade Handling: For Puppet 4.10.x - No changes for now. (We can backport changes from 5.x later if there is customer demand.) For Puppet 5.0.0: a. New installs: Lay down the appropriate v5 hiera.yaml in $confdir and $environment: b. On upgrade: If we detect a hiera.yaml in either $confdir or $environment, don’t install a new file in either location. Don’t remove $hieradata. This is also the summary for related PA issues PA-1169 & PA-1139