Add ModelE2.1 (GCAP 2.0) simulation to GCClassic integration tests

We now run a 2x2.5 ModelE2.1 (aka GCAP 2.0) full-chemistry simulation in
the GCClassic integration tests. Only one scenario (SSP2-4.5) is evaluated
here simply to ensure these future scenario simulations compile and run
for 1 hour successfully. I will defer to @ltmurray for guidance on whether
additional simulations are needed.

The GCAP 2.0 integration test is passing off of 14.4.1, confirming that the
fixes in #2342 should have resolved
the issues of GCAP 2.0 not working in 14.0.0 (as reported by Lee Murray at
IGC11).

Sample integration test output:

```
==============================================================================
GEOS-Chem Classic: Execution Test Results

GCClassic #c49fcec Submod updates: Merge GEOS-Chem PR #2353 and Cloud-J PR #19
GEOS-Chem #7e4001658 Merge PR #2369 (Fix several issues with satellite diagnostics)
HEMCO     #2192e0e HEMCO 3.9.1 release

Using 24 OpenMP threads
Number of execution tests: 29

Submitted as SLURM job: 40462513
==============================================================================

Execution tests:
------------------------------------------------------------------------------
gc_05x0625_NA_47L_merra2_CH4........................Execute Simulation....PASS
gc_05x0625_NA_47L_merra2_fullchem...................Execute Simulation....PASS
gc_2x25_ModelE2.1_fullchem..........................Execute Simulation....PASS
```

Signed-off-by: Melissa Sulprizio <mpayer@seas.harvard.edu>

CHANGELOG.md

@@ -8,6 +8,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ### Added
 - Added number of levels with clouds for photolysis to geoschem_config.yml and Input_Opt to pass to Cloud-J
 - Added `State_Grid%CPU_Subdomain_ID` and `State_Grid%CPU_Subdomain_FirstID` as "identifier numbers" for multiple instances of GEOS-Chem on one core in WRF and CESM
+- Added ModelEe.2 (GCAP 2.0) simulation to integration tests for GCClassic
 
 ### Changed
 - Now reset `State_Diag%SatDiagnCount` to zero in routine`History_Write` (instead of in `History_Netcdf_Write`)

test/integration/GCClassic/integrationTestCreate.sh

@@ -285,6 +285,13 @@ if [[ "X${testsToRun}" == "XALL" ]]; then
     # 4x5 merra2 fullchem_47L
     create_rundir "1\n1\n1\n1\n2\n${rundirsDir}\n\nn\n" "${log}"
 
+    #=========================================================================
+    # GCAP 2.0 simulations
+    #=========================================================================
+
+    # 2x2.5 ModelE2.1 fullchem (scenario SSP2-4.5, option 6)
+    create_rundir "1\n1\n4\n6\n2\n1\n${rundirsDir}\n\nn\n" "${log}"
+
     #=========================================================================
     # Nested-grid simulations
     #=========================================================================

test/shared/commonFunctionsForTests.sh

@@ -32,6 +32,7 @@ SED_CONFIG_3='s/end_date: \[20160201, 000000\]/end_date: \[20190101, 010000\]/'
 SED_CONFIG_4='s/end_date: \[20160101, 000000\]/end_date: \[20190101, 010000\]/'
 SED_CONFIG_5='s/end_date: \[20190201, 000000\]/end_date: \[20190101, 010000\]/'
 SED_CONFIG_6='s/end_date: \[20190801, 000000\]/end_date: \[20190701, 010000\]/'
+SED_CONFIG_7='s/end_date: \[20900801, 000000\]/end_date: \[20900701, 010000\]/'
 SED_CONFIG_N1='s/end_date: \[20190201, 000000\]/end_date: \[20190101, 002000\]/'
 SED_CONFIG_N2='s/end_date: \[20190801, 000000\]/end_date: \[20190701, 002000\]/'
 SED_HEMCO_CONF_1='s/GEOS_0.25x0.3125/GEOS_0.25x0.3125_NA/'
@@ -229,6 +230,7 @@ function update_config_files() {
     sed_ie "${SED_CONFIG_4}" "${runPath}/geoschem_config.yml"
     sed_ie "${SED_CONFIG_5}" "${runPath}/geoschem_config.yml"
     sed_ie "${SED_CONFIG_6}" "${runPath}/geoschem_config.yml"
+    sed_ie "${SED_CONFIG_7}" "${runPath}/geoschem_config.yml"
 
     #------------------------------------------------------------------------
     # Replace text in HEMCO_Config.rc