LogicMonitor Portal Metrics

Thank you, Kerry, for making this available!

I made a minor change to fix pulling of alert metrics, available at GJNN46.

I also included an optional, commented-out variation of the function that processes alert metrics to account for SDT, resulting in numbers similar to those shown on the Alerts tab in LogicMonitor's sidebar. Using that would also make available a new metric - 'SDTedCount' - with the number of active alerts in SDT. (You'd need to add that metric as a datapoint if you try that alternate function.)