OperatorImportFromGeoJson cannot convert polygon with Z values

` MapGeometry mapGeo = OperatorImportFromGeoJson.local().execute(GeoJsonImportFlags.geoJsonImportDefaults, Geometry.Type.Polygon, geojson, null);`

Apparently, the z-values of the polygon in geojson are ignored

Start at the OperatorImportFromGeoJson.local().execute call shown in the issue and trace how a Polygon with GeoJSON Z values is imported. Reproduce the case with a polygon containing Z coordinates, then verify that the resulting MapGeometry preserves those values.

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