update fates hydro test module to change sapwood allometry mode

This update calls the fates parameter modification tooling to set the
grass allometry smode to 1, which is the default for all other fates
PFTs.  This is a temporary workaround for NGEET/fates#1254.

components/elm/cime_config/testdefs/testmods_dirs/elm/fateshydro/shell_commands

@@ -1,2 +1,17 @@
 #!/bin/bash
 if [ `./xmlquery --value MACH` == bebop ]; then ./xmlchange --id LND_PIO_TYPENAME --val netcdf; fi
+module load e4s
+spack env activate gcc
+spack load nco
+
+SRCDIR=`./xmlquery SRCROOT --value`
+CASEDIR=`./xmlquery CASEROOT --value`
+FATESDIR=$SRCDIR/src/fates
+FATESPARAMFILE=$CASEDIR/fates_params_hydrograsstempfix.nc
+
+ncgen -o $FATESPARAMFILE $FATESDIR/parameter_files/fates_params_default.cdl
+
+$FATESDIR/tools/modify_fates_paramfile.py --O --fin $FATESPARAMFILE --fout $FATESPARAMFILE --var fates_allom_smode --val 1 --allpfts
+
+spack unload nco
+module unload e4s

components/elm/cime_config/testdefs/testmods_dirs/elm/fateshydro/user_nl_elm

@@ -5,6 +5,7 @@ hist_nhtfrq       = -24
 hist_empty_htapes = .true.
 use_fates_planthydro = .true.
 fates_spitfire_mode = 1
+fates_paramfile = '$CASEROOT/fates_params_hydrograsstempfix.nc'
 hist_fincl1       = 'FATES_ERRH2O_SZPF', 'FATES_TRAN_SZPF',
 'FATES_SAPFLOW_SZPF', 'FATES_ITERH1_SZPF','FATES_ABSROOT_H2O_SZPF',
 'FATES_TRANSROOT_H2O_SZPF','FATES_STEM_H2O_SZPF','FATES_LEAF_H2O_SZPF',