LMS startup needs to initialize the modulestores so that we don't lazy load all…

LMS startup needs to initialize the modulestores so that we don't lazy load all of the XML courses on first HTTP request

lms/startup.py

@@ -9,6 +9,7 @@ from django.conf import settings
 settings.INSTALLED_APPS  # pylint: disable=W0104
 
 from django_startup import autostartup
+from xmodule.modulestore.django import modulestore
 
 log = logging.getLogger(__name__)
 
@@ -17,3 +18,8 @@ def run():
     Executed during django startup
     """
     autostartup()
+
+    # trigger a forced initialization of our modulestores since this can take a while to complete
+    # and we want this done before HTTP requests are accepted
+    for store_name in settings.MODULESTORE:
+    	modulestore(store_name)