Added support for PE v3.8.0
Added support for PE v3.8.0

Improved hiera::params to introduce support for puppet PE v3.8.0

GeoffWilliams/puppet-hiera,vchepkov/puppet-hiera,reidmv/puppet-hiera,oasys/puppet-hiera,GeoffWilliams/puppet-hiera,stwomack/puppet-hiera,logicminds/puppet-hiera,stwomack/puppet-hiera,logicminds/puppet-hiera,arineng/puppet-hiera,hunner/puppet-hiera,arineng/puppet-hiera,redhat-cip/puppet-hiera,reidmv/puppet-hiera,vchepkov/puppet-hiera,hunner/puppet-hiera,redhat-cip/puppet-hiera,oasys/puppet-hiera