Fix paths for refactored prepocnobs task (NOAA-EMC#2504)

# Description

Cycled testing of the refactoring of prepocnobs revealed more issues
with paths, which this PR should fix.

Refs NOAA-EMC/GDASApp#1047

jobs/JGLOBAL_PREP_OCEAN_OBS

@@ -14,13 +14,10 @@ YMD=${PDY} HH=${cyc} declare_from_tmpl -rx COMOUT_OBS:COM_OBS_TMPL
 # Begin JOB SPECIFIC work
 ##############################################
 
-# Add prep_marine_obs.py to PYTHONPATH
-export PYTHONPATH=${HOMEgfs}/sorc/gdas.cd/ush:${PYTHONPATH}
-
 ###############################################################
 # Run relevant script
 
-EXSCRIPT=${GDASPREPOCNOBSPY:-${USHgfs}/exglobal_prep_ocean_obs.py}
+EXSCRIPT=${GDASPREPOCNOBSPY:-${SCRgfs}/exglobal_prep_ocean_obs.py}
 ${EXSCRIPT}
 status=$?
 [[ ${status} -ne 0 ]] && exit "${status}"

jobs/rocoto/prepoceanobs.sh

@@ -12,6 +12,11 @@ status=$?
 export job="prepoceanobs"
 export jobid="${job}.$$"
 
+###############################################################
+# setup python path for class defs and utils
+
+PYTHONPATH="${PYTHONPATH:+${PYTHONPATH}:}${HOMEgfs}/ush"
+
 ###############################################################
 # Execute the JJOB
 "${HOMEgfs}"/jobs/JGLOBAL_PREP_OCEAN_OBS

sorc/link_workflow.sh

@@ -231,6 +231,7 @@ fi
 #------------------------------
 if [[ -d "${HOMEgfs}/sorc/gdas.cd/build" ]]; then
   cd "${HOMEgfs}/ush" || exit 1
+  ${LINK_OR_COPY} "${HOMEgfs}/sorc/gdas.cd/ush/soca"                              .
   ${LINK_OR_COPY} "${HOMEgfs}/sorc/gdas.cd/ush/ufsda"                              .
   ${LINK_OR_COPY} "${HOMEgfs}/sorc/gdas.cd/ush/jediinc2fv3.py"                     .
   ${LINK_OR_COPY} "${HOMEgfs}/sorc/gdas.cd/ush/ioda/bufr2ioda/gen_bufr2ioda_json.py"    .