We bumped the Kibana version from 4.4 to 4.6 with
Ia18cb89e0951359226add5cbd96d3a91c7fcfd8a. This version should be
used on the gates as well.

Change-Id: I21ccac9a12e4b604d3cf336c6263f2e4cd925524
Closes-bug: #1634049