energy balance.

values returned by the harvester daily_bfg.py. The test
is for the derived variable netR. netR is derived from
the variables dswrf_ave,dlwrf_ave,ulwrf_ave,uswrf_ave,shtfl_ave,lhtfl_ave
which are located in the bfg control netcdf files. The values for
weighted mean,min,max and variance of each of the variables
are calculated in a separate python script and hard coded
in the file.

The netR is the name given to the surface energy balance.
The netR is derived from the following variables:
 dswrf_ave,dlwrf_ave,ulwrf_ave,uswrf_ave,shtfl_ave,lhtfl_ave
located in the bfg control Netcdf files in the test data directory.
The statistics weighted_mean,minimum,maximum and variance of each
of the required variables are calculated in the pyton script.
The weighted_mean of netR is also calculated.  The statistics
are calculated using the python class located in src/score_hv
stats_utils.py.

and variance of the required variables that are needed to calculate
the derived field surface energy balance.

to line 216.
Uncommented the field prateb_ave.