MUON: PlotAsymmetryByLogValue - also plot none double values

[Anders-Markvardsen]

See text from James. To implement this. When log value is not a double instead do a scatter plot.

Text from James:

Normally plotting versus a non-numeric parameter doesn't make sense but I was using this as a short cut to extract the non-numeric logs from a large number of runs to see if they corresponded at all to some odd features in the data. Time of day may have been useful (likely to be related to the temperature of the instrument and its detectors, and presence of users).

[Anders-Markvardsen]

This issue was originally trac ticket 3225