function New-Guid {
    [System.Guid]::NewGuid().ToString("d").Substring(0, 6).Replace("-", "")
}

function New-Guid {
    [System.Guid]::NewGuid().ToString("d").Substring(0, 4).Replace("-", "")
}

Change test framework to use 4 chars of guid for random names.
Change test framework to use 4 chars of guid for random names.
