HFC units incorrect in the Diagnostic|* variables

[gaurav-ganti]

While using the Diagnostics|MAGICC6|Harmonized Input|Emissions|HFC* variables, @znicholls noticed that the reported emission units (kt HFC23 / yr) for all HFC emissions are incorrect - for e.g., the unit for Diagnostics|MAGICC6|Harmonized Input|Emissions|HFC|HFC125 is mislabelled kt HFC23 / yr, while the values reported are appropriate when the correct unit (kt HFC125 / yr) is applied.

We corrected this in the data used using the unit mapping dictionary below:

unit_mapping = {
    "Emissions|HFC|HFC125":"kt HFC125 / yr",
    "Emissions|HFC|HFC134a":"kt HFC134a / yr",
    "Emissions|HFC|HFC143a":"kt HFC143a / yr",
    "Emissions|HFC|HFC227ea": "kt HFC227ea / yr",
    "Emissions|HFC|HFC245ca": "kt HFC245ca /yr",
    "Emissions|HFC|HFC32": "kt HFC32 / yr",
    "Emissions|HFC|HFC43-10": "kt HFC4310 / yr"
}

cc - @gidden