(bug 45892) add second cron job for wikidata dispatching changes

- the duration of and frequency of cron jobs is not very important,
as the script constantly cycles through looking for changes to send to clients.

Change-Id: I84292fcde2b5ae5f593723b4e4963a87e30224aa
Merge "(bug 45892) add second cron job for wikidata dispatching changes" into production