Move analytics initialization out of lms.startup.run

lms.startup is being removed, so initialize the analytics module in the
lms_initialization ready() method instead.

lms/djangoapps/lms_initialization/apps.py

@@ -22,4 +22,11 @@ class LMSInitializationConfig(AppConfig):
         Global LMS initialization methods are called here.  This runs after
         settings have loaded, but before most other djangoapp initializations.
         """
-        pass
+        self._initialize_analytics()
+
+    def _initialize_analytics(self):
+        """
+        Initialize Segment analytics module by setting the write_key.
+        """
+        if settings.LMS_SEGMENT_KEY:
+            analytics.write_key = settings.LMS_SEGMENT_KEY

lms/startup.py

@@ -13,7 +13,6 @@ settings.INSTALLED_APPS  # pylint: disable=pointless-statement
 
 from openedx.core.lib.django_startup import autostartup
 from openedx.core.release import doc_version
-import analytics
 
 from openedx.core.djangoapps.monkey_patch import django_db_models_options
 
@@ -57,10 +56,6 @@ def run():
     # Mako requires the directories to be added after the django setup.
     microsite.enable_microsites(log)
 
-    # Initialize Segment analytics module by setting the write_key.
-    if settings.LMS_SEGMENT_KEY:
-        analytics.write_key = settings.LMS_SEGMENT_KEY
-
     # register any dependency injections that we need to support in edx_proctoring
     # right now edx_proctoring is dependent on the openedx.core.djangoapps.credit and
     # lms.djangoapps.grades