[FTS] Differing ES and FTS results for geospatial queries

This ticket is a log of geospatial queries that return differing results with ES and FTS during functional testing. 

The dataset for this testing is attached as `geoshape2.json`. The plots contain the query shape and the differing hits plotted as a GeoJSON file for convenient visualisation using geojson.io 

1. A multipolygon 'intersects' query results in FTS returning 1 hit and ES returning none. 

The executor logs showing the test failure are available on this link. 

The query is in `query.json` and the plot is in `map(1).geojson`. 

2. A polygon 'within' query results in FTS returning a point, but ES returns no hits.

The executor logs showing the test failure are available here: http://qa.sc.couchbase.com/job/test_suite_executor/491922/console.

The query is in `query2.json`. The plot is in in `map(2).geojson`. 

3. A polygon 'intersects' query results in FTS returning an additional hit compared to the ES hits.

The query is in `query3.json`. The plot is in `map(3).geojson`.

4. A polygon 'within' query returning an additional hit in FTS compared to the ES hits.

The query is in `query4.json`. The plot is in `map(4).geojson`.

5. A polygon 'intersects' query returns 2 additional ES hits compared to FTS.

The query is in `query5.json`. The plot is in `map(5).geojson`. 

6. A polygon 'within' query returns an additional ES hit compared to the FTS hits.

The query is in `query6.json`. The plot is in `map(6).geojson`.