Revise misleading documentation in MetricPlugin.hh
The "level" parameter of MetricPlugin has misleading Doxygen documentation. Interestingly enough, the FHiCL parameter declaration has much better documentation.
Currently, the Doxygen documentation reads:
The verbosity level of the metric plugin. Higher number = fewer metrics sent to the metric storage
I am going to replace this with the following, which is used as the fhicl::Comment for that parameter:
The verbosity level threshold for this plugin. sendMetric calls with verbosity level greater than this will not be sent to the plugin.