Changes to get C48 aerosol test ready (NOAA-EMC#1829)

This PR partially addresses NOAA-EMC#1821 in that it allows for a C48 simplified aerosol 3DVar test
using the workflow to run in GDASApp CI testing. The workflow team will be able to adapt
this test case for their CI testing with minimal effort.

This limits the C48 aerosol analysis to 6 PEs and updates the hash of GDASApp to a stable
build from this morning.

Refs NOAA-EMC#1821

Externals.cfg

@@ -57,7 +57,7 @@ protocol = git
 required = False
 
 [GDASApp]
-hash = 2774a10
+hash = f614cc2
 local_path = sorc/gdas.cd
 repo_url = https://github.com/NOAA-EMC/GDASApp.git
 protocol = git

parm/config/gfs/config.resources

@@ -249,18 +249,23 @@ elif [[ "${step}" = "aeroanlinit" ]]; then
 
    # below lines are for creating JEDI YAML
    case ${CASE} in
-     C768)
+      C768)
         layout_x=8
         layout_y=8
         ;;
       C384)
         layout_x=8
         layout_y=8
         ;;
-     C192 | C96 | C48)
+      C192 | C96)
         layout_x=8
         layout_y=8
         ;;
+      C48 )
+        # this case is for testing only
+        layout_x=1
+        layout_y=1
+        ;;
       *)
           echo "FATAL ERROR: Resolution not supported for aerosol analysis'"
           exit 1
@@ -279,18 +284,23 @@ elif [[ "${step}" = "aeroanlinit" ]]; then
 elif [[ "${step}" = "aeroanlrun" ]]; then
 
    case ${CASE} in
-     C768)
+      C768)
         layout_x=8
         layout_y=8
         ;;
       C384)
         layout_x=8
         layout_y=8
         ;;
-     C192 | C96 | C48)
+      C192 | C96)
         layout_x=8
         layout_y=8
         ;;
+      C48 )
+        # this case is for testing only
+        layout_x=1
+        layout_y=1
+        ;;
       *)
           echo "FATAL ERROR: Resolution ${CASE} is not supported, ABORT!"
           exit 1

sorc/checkout.sh

@@ -160,7 +160,7 @@ if [[ ${checkout_gsi} == "YES" ]]; then
 fi
 
 if [[ ${checkout_gdas} == "YES" ]]; then
-  checkout "gdas.cd" "https://github.com/NOAA-EMC/GDASApp.git" "2774a10"; errs=$((errs + $?))
+  checkout "gdas.cd" "https://github.com/NOAA-EMC/GDASApp.git" "f614cc2"; errs=$((errs + $?))
 fi
 
 if [[ ${checkout_gsi} == "YES" || ${checkout_gdas} == "YES" ]]; then