(MODULES-2770) Restrict to WMF 5.0 RTM Version
(MODULES-2770) Restrict to WMF 5.0 RTM Version

This commit updates the PowerShell version to the RTM version of
WMF 5.0 instead of the pre-release version it used to use.

Iristyle/puppetlabs-dsc,jpogran/puppetlabs-dsc,Iristyle/puppetlabs-dsc,puppetlabs/puppetlabs-dsc,puppetlabs/puppetlabs-dsc,jpogran/puppetlabs-dsc,Iristyle/puppetlabs-dsc,Iristyle/puppetlabs-dsc,puppetlabs/puppetlabs-dsc,jpogran/puppetlabs-dsc