Revert "Turn off real time index updates"

This reverts commit 506e0d5b.
ECOM-7346

course_discovery/settings/base.py

@@ -430,8 +430,7 @@ HAYSTACK_CONNECTIONS = {
     },
 }
 
-# We are using BaseSignalProcessor to avoid overloading our production ES instance
-HAYSTACK_SIGNAL_PROCESSOR = 'haystack.signals.BaseSignalProcessor'
+HAYSTACK_SIGNAL_PROCESSOR = 'haystack.signals.RealtimeSignalProcessor'
 HAYSTACK_INDEX_RETENTION_LIMIT = 3
 
 # Elasticsearch search query facet "size" option to increase from the default value of "100"

course_discovery/settings/shared/test.py

@@ -8,10 +8,6 @@ HAYSTACK_CONNECTIONS = {
     },
 }
 
-# We are using RealtimeSignalProcessor because our tests depend on it being enabled
-# and it does not cause performance issues for testing
-HAYSTACK_SIGNAL_PROCESSOR = 'haystack.signals.RealtimeSignalProcessor'
-
 SYNONYMS_MODULE = 'course_discovery.settings.test_synonyms'
 
 EDX_DRF_EXTENSIONS = {