Continue TS when virtual machine detected.

[beanska]

Please consider having Virtual machine models return 0 in Invoke-CMDownloadDriverPackage.ps1. Since no drivers are needed it would be nice for the TS to continue when testing the TS in a virtual environment.

if ($ComputerSystemType -notin @("Virtual Machine", "VMware Virtual Platform", "VirtualBox", "HVM domU", "KVM")) {
...
} else {
    Write-CMLogEntry -Value "Virtual machine model. No drivers required." -Severity 2 ; exit 0
}