Move datadog startup.py over to AppConfig::ready

cms/envs/common.py

@@ -963,7 +963,7 @@ INSTALLED_APPS = [
     'eventtracking.django.apps.EventTrackingConfig',
 
     # Monitoring
-    'openedx.core.djangoapps.datadog',
+    'openedx.core.djangoapps.datadog.apps.DatadogConfig',
 
     # For asset pipelining
     'edxmako.apps.EdxMakoConfig',

lms/envs/common.py

@@ -2158,7 +2158,7 @@ INSTALLED_APPS = [
     'splash',
 
     # Monitoring
-    'openedx.core.djangoapps.datadog',
+    'openedx.core.djangoapps.datadog.apps.DatadogConfig',
 
     # User API
     'rest_framework',

openedx/core/djangoapps/datadog/startup.py → openedx/core/djangoapps/datadog/apps.py

 """
-Start up initialization of datadog.
+Configuration for datadog Django app
 """
+from django.apps import AppConfig
 from django.conf import settings
 from dogapi import dog_http_api, dog_stats_api
 
 
-def run():
+class DatadogConfig(AppConfig):
     """
-    Initialize connection to datadog during django startup.
-
-    Can be configured using a dictionary named DATADOG in the django
-    project settings.
+    Configuration class for datadog Django app
+    """
+    name = 'openedx.core.djangoapps.datadog'
+    verbose_name = "Datadog"
 
+    def ready(self):
         """
+        Initialize connection to datadog during django startup.
 
+        Configure using DATADOG dictionary in the django project settings.
+        """
         # By default use the statsd agent
         options = {'statsd': True}