Updated reviewer tools search to use search API (bug 833500)

There are a few things missing here which I will file bugs for:

* While the queue sorting still works b/c queues still use the database, search sorting needs to be added in, but this depends on having the required sorting fields in elasticsearch, which are not yet there (e.g. waiting time).

* I've temporarily removed the advanced search options to filter by reviewer flags (escalated, has comment, info requested) because these do not live in elasticsearch yet.

* The search results end up looking like this: http://cl.ly/image/430c3g0p1Y3m. While this is perhaps functional for now, it needs the "undefined" fields to be fixed. This is dependent on bug 838916 to add author and fix device types.