Include metrics to track flickering bridges/resources by onbasca ratio

While rdsys collects metrics for onbasca's bandwidth ratio and provides insight on a resource's state (untested, accepted, rejected), it would be useful to have more insight into whether and how often resources "flicker", meaning how often do accepted or rejected resources change back and forth? The first step is to figure out if this happens. Then when we have collected some metrics about it and have determined if it does indeed happen, and how often, we can expand upon the information we collect about it.