change to query that works across eS 5 and ES 6 boundary

[epugh]

Description

Change to a query type that runs across ES 5 and 6

Motivation and Context

This is to deal with the issue raised by #2

How Has This Been Tested?

Created new ES 5, 6, and 7 deploys with the SAME dataset and then manually tested:
https://github.com/o19s/quepid/wiki/Troubleshooting-Elasticsearch-and-Quepid#demo-elasticsearch-indexes-with-the-tmdb-dataset

Screenshots or GIFs (if appropriate):

{
  "query": {
   "query_string": {
      "query": "#$query##"
   }
  }
}

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• [] New feature (non-breaking change which adds functionality)
• [] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• [] My change requires a change to the documentation.
• [] I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• [] I have added tests to cover my changes.
• All new and existing tests passed.

[epugh]

Okay, in poking around, I've learned that this code never got merged. I've retested this template, and it does work, so need to merge.

[epugh]

just retested