Merge pull request #4670 from edx/bfiller/fix-journals-error

Default to false if JOURNALS_ENABLED not defined

playbooks/roles/edxapp/defaults/main.yml

@@ -1553,7 +1553,7 @@ SERVICE_WORKER_USERS:
     username: "{{ JOURNALS_SERVICE_USER_NAME }}"
     is_staff: true
     is_superuser: false
-    enabled: "{{ JOURNALS_ENABLED }}"
+    enabled: "{{ JOURNALS_ENABLED|default(false) }}"
   - email: "{{ DISCOVERY_SERVICE_USER_EMAIL }}"
     username: "{{ DISCOVERY_SERVICE_USER_NAME }}"
     is_staff: true