Upgrade Kibana to 4.6 series
Upgrade Kibana to 4.6 series

This commit updates the Kibana repo to start using the newer
4.6 series.  This has been tested against a set of freshly
updated EL7 VMs.

https://www.elastic.co/guide/en/kibana/4.6/releasenotes.html

kibana 4.6 also requires elasticsearch 2.4 or later, this is
provided by this playbook already.

Change-Id: Ibe6c2b7d818b37ea142a20ed30359c4582c07f0a

jkilpatr/browbeat,jkilpatr/browbeat