investigate moving most/all searchable tables from MySQL to ElasticSearch

[ghukill]

As Combine takes in more records, some tables are responsive, others less so.

A particularly egregious example of this is the Record table for testing screens. Given a search term, when Combine has 1m+, it becomes prohibitively slow, if not outright timeout error.

Same is true for other tables however, those that are using the Datatables connector to a MySQL view.

If this were tackled, this would serve to also address these issues:

• return Record ES doc highlighting for global search #172
• Record refinement for test scenarios too inclusive #178
• likely others

[ghukill]

Closing - this has been partially addressed switching to Mongo, and other issues pertaining to ES for tables and searching.