Update grades app to be a Django App Plugin

lms/djangoapps/grades/apps.py

@@ -7,6 +7,7 @@ Signal handlers are connected here.
 from django.apps import AppConfig
 from django.conf import settings
 from edx_proctoring.runtime import set_runtime_service
+from openedx.core.djangolib.django_plugins import ProjectType, SettingsType, PluginURLs, PluginSettings
 
 
 class GradesConfig(AppConfig):
@@ -15,6 +16,23 @@ class GradesConfig(AppConfig):
     """
     name = u'lms.djangoapps.grades'
 
+    plugin_app = {
+        PluginURLs.CONFIG: {
+            ProjectType.LMS: {
+                PluginURLs.NAMESPACE: u'grades_api',
+                PluginURLs.REGEX: u'api/grades/',
+                PluginURLs.RELATIVE_PATH: u'api.urls',
+            }
+        },
+        PluginSettings.CONFIG: {
+            ProjectType.LMS: {
+                SettingsType.AWS: {PluginSettings.RELATIVE_PATH: u'settings.aws'},
+                SettingsType.COMMON: {PluginSettings.RELATIVE_PATH: u'settings.common'},
+                SettingsType.TEST: {PluginSettings.RELATIVE_PATH: u'settings.test'},
+            }
+        }
+    }
+
     def ready(self):
         """
         Connect handlers to recalculate grades.

lms/djangoapps/grades/settings/aws.py

@@ -0,0 +1,10 @@
+def plugin_settings(settings):
+    # Queue to use for updating persistent grades
+    settings.RECALCULATE_GRADES_ROUTING_KEY = settings.ENV_TOKENS.get(
+        'RECALCULATE_GRADES_ROUTING_KEY', settings.LOW_PRIORITY_QUEUE,
+    )
+
+    # Queue to use for updating grades due to grading policy change
+    settings.POLICY_CHANGE_GRADES_ROUTING_KEY = settings.ENV_TOKENS.get(
+        'POLICY_CHANGE_GRADES_ROUTING_KEY', settings.LOW_PRIORITY_QUEUE,
+    )

lms/djangoapps/grades/settings/common.py

@@ -0,0 +1,6 @@
+def plugin_settings(settings):
+    # Queue to use for updating persistent grades
+    settings.RECALCULATE_GRADES_ROUTING_KEY = settings.LOW_PRIORITY_QUEUE
+
+    # Queue to use for updating grades due to grading policy change
+    settings.POLICY_CHANGE_GRADES_ROUTING_KEY = settings.LOW_PRIORITY_QUEUE

lms/djangoapps/grades/settings/test.py

@@ -0,0 +1,3 @@
+def plugin_settings(settings):
+    settings.FEATURES['PERSISTENT_GRADES_ENABLED_FOR_ALL_TESTS'] = True
+    settings.FEATURES['ASSUME_ZERO_GRADE_IF_ABSENT_FOR_ALL_TESTS'] = True