Specify Maximum Y Axis Value

[itoleck]

Would like to be able to specify a maximum Y Axis value as sometimes the maximum datapoint value is not necessarily the highest needed. Green, Yellow and Red values can also be more useful if you can specify a maximum Y value.

Can be done by adding a new parameter and changing a line in the Show-Graph.ps1

[int] $YMAX = 100,
If($PSBoundParameters.ContainsKey("YMAX")) {
$Metric.Maximum = $YMAX
}