Cut over geo_point field and queries to new LatLonPoint type

This commit cuts over geo_point fields to use Lucene's new point-based LatLonPoint type for indexes created in 5.0. Indexes created prior to 5.0 continue to use their respective encoding type. Below is a description of the changes made to support the new encoding type:

* New indexes use a new LatLonPointFieldMapper which provides a parse method for the new type
* The new LatLonPoint parse method removes support for lat_lon and geohash parameters
* Backcompat testing for deprecated lat_lon and geohash parameters is added to all unit and integration tests
* LatLonPointFieldMapper provides DocValues support (enabled by default) which uses Lucene's new LatLonDocValuesField type
* New LatLonPoint field data classes are added for aggregation support (wraps LatLonPoint's Numeric Doc Values)
* MultiFields use the geohash as the string value instead of the lat,lon string making it easier to perform geo string queries on the geohash instead of a lat,lon comma delimited string.

Removed Features:

* With the removal of geohash indexing, GeoHashCellQuery support is removed for all new indexes (still supported on existing indexes)
* LatLonPoint does not support a Distance Range query because it is super inefficient. Instead, the geo_distance_range query should be accomplished using either the geo_distance aggregation, sorting by descending distance on a geo_distance query, or a boolean must not of the excluded distance (which is what the distance_range query did anyway).

TODO:

* fix/finish yaml changes for plugin and rest integration tests
* update documentation

1 files changed, 2 insertions, 1 deletions

diff --git a/core/src/main/java/org/elasticsearch/search/suggest/completion/context/GeoContextMapping.java b/core/src/main/java/org/elasticsearch/search/suggest/completion/context/GeoContextMapping.java
index 854a5fb0e1..bd1449bbfe 100644
--- a/core/src/main/java/org/elasticsearch/search/suggest/completion/context/GeoContextMapping.java
+++ b/core/src/main/java/org/elasticsearch/search/suggest/completion/context/GeoContextMapping.java
@@ -207,7 +207,8 @@ public class GeoContextMapping extends ContextMapping<GeoQueryContext> {
                     if (field instanceof StringField) {
                         spare.resetFromString(field.stringValue());
                     } else {
-                        spare.resetFromIndexHash(Long.parseLong(field.stringValue()));
+                        // todo return this to .stringValue() once LatLonPoint implements it
+                        spare.resetFromIndexableField(field);
                     }
                     geohashes.add(spare.geohash());
                 }