Changes to queries for 5.0 (#2046)

See https://www.elastic.co/guide/en/elasticsearch/reference/master/breaking_50_search_changes.html#_changes_to_queries for details.
See #1997

deprecate fuzziness ratio and make setting it a noop. It looks like this was deprecated in 1.7 and should have been removed in 2.0 - https://www.elastic.co/guide/en/elasticsearch/reference/1.7/common-options.html#fuzziness

Author: russcam

Diff for: src/Nest/CommonOptions/Fuzziness/FuzzinessJsonConverter.cs

@@ -12,10 +12,9 @@ internal class FuzzinessJsonConverter : JsonConverter
 		public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
 		{
 			var v = value as IFuzziness;
-			if (v.Auto) writer.WriteValue("AUTO"); 
-			else if (v.EditDistance.HasValue) writer.WriteValue(v.EditDistance.Value); 
-			else if (v.Ratio.HasValue) writer.WriteValue(v.Ratio.Value);
-			else writer.WriteNull(); 
+			if (v.Auto) writer.WriteValue("AUTO");
+			else if (v.EditDistance.HasValue) writer.WriteValue(v.EditDistance.Value);
+			else writer.WriteNull();
 		}
 
 		public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
@@ -27,13 +26,8 @@ public override object ReadJson(JsonReader reader, Type objectType, object exist
 				var editDistance = Convert.ToInt32(reader.Value);
 				return Fuzziness.EditDistance(editDistance);
 			}
-			if (reader.TokenType == JsonToken.Float)
-			{
-				var ratio = (reader.Value as double?).GetValueOrDefault(0);
-				return Fuzziness.Ratio(ratio);
-			}
 			return null;
 		}
 
 	}
-}
+}

Diff for: src/Nest/CommonOptions/Fuzziness/IFuzziness.cs

@@ -1,4 +1,5 @@
-using Newtonsoft.Json;
+using System;
+using Newtonsoft.Json;
 
 namespace Nest
 {
@@ -7,6 +8,8 @@ public interface IFuzziness
 	{
 		bool Auto { get;  }
 		int? EditDistance { get;  }
+
+		[Obsolete("Deprecated. Setting this is a noop")]
 		double? Ratio { get;  }
 	}
-}
+}