Update J1850G compset

[Katetc]

The current J1850G compset is set to: 1850_DATM%CRU_CLM50%BGC-CROP_CICE_POP2_MOSART_CISM2%EVOLVE_SWAV

But it should be: 1850_DATM%CRU_CLM50%BGC-CROP_CICE_POP2%ECO_MOSART_CISM2%EVOLVE_WW3_BGC%BDRD

Also, running a quick ERS test on the J1850G compset with the resolution used in the glacier spin-up runs results in these errors:

    Model datm missing file file1 = '/glade/p/cgd/tss/CTSM_datm_forcing_data/atm_forcing.datm7.cruncep_qianFill.0.5d.V4.c130305/Precip6Hrly/clmforc.cruncep.V4.c2011.0.5d.Prec.1901-01.nc'
        Cannot download file since it lives outside of the input_data_root '/glade/p/cesmdata/cseg/inputdata'
    Model datm missing file file2 = '/glade/p/cgd/tss/CTSM_datm_forcing_data/atm_forcing.datm7.cruncep_qianFill.0.5d.V4.c130305/Precip6Hrly/clmforc.cruncep.V4.c2011.0.5d.Prec.1901-02.nc'
        Cannot download file since it lives outside of the input_data_root '/glade/p/cesmdata/cseg/inputdata'
    Model datm missing file file3 = '/glade/p/cgd/tss/CTSM_datm_forcing_data/atm_forcing.datm7.cruncep_qianFill.0.5d.V4.c130305/Precip6Hrly/clmforc.cruncep.V4.c2011.0.5d.Prec.1901-03.nc'
        Cannot download file since it lives outside of the input_data_root '/glade/p/cesmdata/cseg/inputdata'

This error goes on 240 times. Also seems to be some errors about missing '/glade/p/cgd/tss/CTSM_datm_forcing_data/atm_forcing.datm7.cruncep_qianFill.0.5d.V4.c130305/Solar6Hrly/clmforc.cruncep.V4.c2011.0.5d.Solr.1917-07.nc' and possibly others. So, maybe the forcing data needs to be updated for this compset as well?

[Katetc]

Two issues with the proposed compset in the above comment have come to light.

1. The stream forcing files for datm%CRU no longer exist on Cheyenne. So, it is probably required to change this part of the compset to datm%CRUv7. And
2. The last part of this compset ("BGC%BDRD") changes the values of CLM_CO2_TYPE and OCN_CO2_TYPE to "diagnostic" instead of constant, so this compset requires a DATM_CO2_TSERIES (CO2 time series file). Currently, Erik doesn't believe that there is an 1850 CO2 timeseries file, as it is mostly used for historical runs. Sooooo, really not sure what to do with this right now. Will get some more feedback from the glacier guys.

[billsacks]

For now, @Katetc and I decided to remove J1850G from the CESM2.1.0 release (see #94 ). We'll revisit this question for a later release.