Description of problem:
Prior to RHQ 4.12 it was possible to produce an aggregate metric like {min: Double.NaN, max: Double.NaN, avg: 0.0}. This was caused in part by not handling late measurement reports. When these invalid metrics are included in the result set for a query to fetch data points for a graph, it could result in an IllegalArgumentException being thrown from MetricsServer.createComposites.

InvalidMetricsManager was introduced to handle metrics where max < avg or min > avg, but it also needs to treat metrics having NaN as a value as invalid.


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