Cache program UUIDs after caching details

This prevents the LMS from requesting details for programs which the command hasn't been able to cache yet, which would throw off monitoring we'll be setting up to keep an eye on missing entries.

LEARNER-382

openedx/core/djangoapps/catalog/management/commands/cache_programs.py

@@ -51,8 +51,7 @@ class Command(BaseCommand):
             raise
 
         total = len(uuids)
-        logger.info('Caching UUIDs for {total} programs.'.format(total=total))
-        cache.set(PROGRAM_UUIDS_CACHE_KEY, uuids, None)
+        logger.info('Received {total} UUIDs.'.format(total=total))
 
         programs = {}
         failure = False
@@ -73,12 +72,8 @@ class Command(BaseCommand):
         logger.info('Caching details for {successful} programs.'.format(successful=successful))
         cache.set_many(programs, None)
 
-        logger.info(
-            'Program caching complete. Successfully cached {successful} of {total} programs.'.format(
-                successful=successful,
-                total=total
-            )
-        )
+        logger.info('Caching UUIDs for {total} programs.'.format(total=total))
+        cache.set(PROGRAM_UUIDS_CACHE_KEY, uuids, None)
 
         if failure:
             # This will fail a Jenkins job running this command, letting site