openqa/dispatcher: update schedule.conf for scheduler changes

since resultsdb submission was added to the scheduler, we must
disable it here for now (as we don't want to use it yet), and
also update the name of the config directive that controls wiki
result submission.

roles/openqa/dispatcher/templates/schedule.conf.j2

@@ -1,6 +1,7 @@
 [report]
+submit_resultsdb: false
 {% if wikitcms_user is defined and wikitcms_password is defined %}
-submit: true
+submit_wiki: true
 {% else %}
-submit: false
+submit_wiki: false
 {% endif %}