Merge pull request #9124 from edx/jsa/no-course-discovery-in-devstack

disable course discovery feature by default in devstack.

lms/envs/devstack.py

@@ -159,7 +159,7 @@ COURSE_DISCOVERY_MEANINGS = {
     'language': LANGUAGE_MAP,
 }
 
-FEATURES['ENABLE_COURSE_DISCOVERY'] = True
+FEATURES['ENABLE_COURSE_DISCOVERY'] = False
 FEATURES['COURSES_ARE_BROWSEABLE'] = True
 HOMEPAGE_COURSE_MAX = 9