(maint) Prime Feature and Instance installation with .Net 3.5 source

[wilson208]

Previously, there was known bug with installing .Net Framework 3.5 on Server
2012R2 due to the installation media not making the required features available,
instead they were removed. This commit copies and mounts a Windows Server
2012 R2 installation ISO and uses the windows_feature_source property in the
module to use the I:\source\sxs folder for feature installation components.

[glennsarti]

The SQL Server module already installs dot net framework.

See

puppetlabs-sqlserver/lib/puppet/provider/sqlserver.rb

Lines 51 to 71 in bb38c4c

	install_dot_net = <<-DOTNET
	$Result = Dism /online /Get-featureinfo /featurename:NetFx3
	If($Result -contains "State : Enabled")
	{
	Write-Host ".Net Framework 3.5 is already installed."
	}
	Else
	{
	Write-Host "Installing .Net Framework 3.5, do not close this prompt..."
	DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /NoRestart /Quiet /LimitAccess #{ "/Source:\"#{source_location}\"" unless source_location.nil? } | Out-Null
	$Result = Dism /online /Get-featureinfo /featurename:NetFx3
	If($Result -contains "State : Enabled")
	{
	Write-Host "Install .Net Framework 3.5 successfully."
	}
	Else
	{
	Write-Host "Failed to install Install .Net Framework 3.5#{ ", please make sure the windows_feature_source is correct" unless source_location.nil?}."
	}
	}
	DOTNET

[glennsarti]

@wilson208 Ran this through adhoc and it completed with success. Just need to cleanup the commit messages and this is good for merge.