Add Set-DscMachineRebootRequired from xPSDesiredStateConfiguration

[PlagueHO]

<#
    .SYNOPSIS
        Sets the Global DSCMachineStatus variable to a value of 1.
#>
function Set-DscMachineRebootRequired
{
    # Suppressing this rule because $global:DSCMachineStatus is used to trigger a reboot.
    [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSAvoidGlobalVars', '')]
    <#
        Suppressing this rule because $global:DSCMachineStatus is only set,
        never used (by design of Desired State Configuration).
    #>
    [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUseDeclaredVarsMoreThanAssignments', '')]
    [CmdletBinding()]
    param
    (
    )

    $global:DSCMachineStatus = 1
}