Add JEDI-testing application testing capability to JEDI Python class (NOAA-EMC#4621)

This adds the capability in the JEDI Python class to turn on JEDI
application tests by adding a `app_test_yaml` to its configuration file.

Previously application tests were turned on in the "JCB prototype YAML"
for various JEDI-based GW jobs. The YAMLs were removed in
NOAA-EMC/GDASApp#1999 in order to consolidate
configuration files in line with the JEDI class refactoring done in
NOAA-EMC#4306.

Author: DavidNew-NOAA

sorc/gdas.cd

@@ -16,7 +16,8 @@
 logger = getLogger(__name__.split('.')[-1])
 
 required_jedi_keys = ['jedi_app_name', 'rundir', 'exe_src', 'mpi_cmd', 'jcb_base_yaml']
-optional_jedi_keys = ['jedi_args', 'jcb_algo', 'jcb_algo_yaml', 'obs_list_yaml', 'bias_files_yaml']
+optional_jedi_keys = ['jedi_args', 'jcb_algo', 'jcb_algo_yaml',
+                      'obs_list_yaml', 'bias_files_yaml', 'app_test_yaml']
 
 
 class Jedi:
@@ -98,6 +99,10 @@ def __init__(self, config: Dict[str, Any], task_config: AttrDict) -> None:
         if self.jedi_config.obs_list_yaml is not None:
             self.jcb_config['observations'] = parse_j2yaml(self.jedi_config.obs_list_yaml, task_config)['observations']
 
+        # Include test reference YAML in JCB config if app_test_yaml specified
+        if task_config.DO_TEST_MODE and self.jedi_config.app_test_yaml is not None:
+            self.jcb_config.update(parse_j2yaml(self.jedi_config.app_test_yaml, task_config))
+
         # Set object attributes
         # ---------------------