Elasticsearch upgrade starting

* Put cirrus is "building" mode so no one gets it as a betafeature
* Move all wikis running cirrus as primary back to lsearchd
* Remove all cirrus jobs from the list of default jobs to work so none will
be attempted during the upgrade

Change-Id: I15e382786a43f85e8e84c2019a5cab494af2d43b
Merge "Elasticsearch upgrade starting"