VM-side staging deployment script.
Simplify TermFilter, DateRangeFilter, and TermSearch

Includes:

* Simplified controller integration
* Cleaner model / search / filter configuration
* More idiomatic rendering
Prevent multiple calls to #query

Iterating over multiple TermSearch objects and separately applying them
to a search causes multiple calls to #query, of which only the last will
make it to elastic search.

This change re-structures things so a single #query is called and each
TermSearch adds a must-match clause to it.
Fix mocking of elastic search

* Also update specs which require search to have the correct tag