Add PYTHONPATH to soca ocean prep jjob (NOAA-EMC#1292)

Adds the UFSDA location to PYTHONPATH in soca prep jjob so the path building is not done in script.

Refs: NOAA-EMC/GDASApp#242 and NOAA-EMC/GDASApp#234

The issues require changes also to GDASApp, but this PR will not break GDASApp as is

jobs/JGDAS_GLOBAL_OCEAN_ANALYSIS_PREP

@@ -32,6 +32,11 @@ mkdir -p "${COMOUT}"
 # COMIN_GES and COMIN_GES_ENS are used in script
 export COMIN_GES="${ROTDIR}/${GDUMP}.${gPDY}/${gcyc}/ocean"
 
+# Add UFSDA to PYTHONPATH
+ufsdaPATH="${HOMEgfs}/sorc/gdas.cd/ush/"
+PYTHONPATH="${PYTHONPATH:+${PYTHONPATH}:}${ufsdaPATH}"
+export PYTHONPATH
+
 ###############################################################
 # Run relevant script