Ensure GeoLocationFormatter returns GeoLocation type (#4026)

The ReindexApiTests were failing on a serialisation roundtrip when dealing with properties that used the GeoLocation type. This manifested due to the inclusion of GeoLocation types in the _source serialisation on commit 5492599

The GeoLocationFormatter was found to be returning a GeoCoordinate type and not a GeoLocation type.

src/Nest/QueryDsl/Geo/GeoLocationFormatter.cs

@@ -42,7 +42,7 @@ public GeoLocation Deserialize(ref JsonReader reader, IJsonFormatterResolver for
 					reader.ReadNextBlock();
 			}
 
-			return new GeoCoordinate(lat, lon);
+			return new GeoLocation(lat, lon);
 		}
 
 		public void Serialize(ref JsonWriter writer, GeoLocation value, IJsonFormatterResolver formatterResolver)