fix #982 missing minimum_should_match

Author: Mpdreamz

Diff for: src/Nest/DSL/Query/MultiMatchQueryDescriptor.cs

@@ -50,6 +50,9 @@ public interface IMultiMatchQuery : IQuery
 		[JsonProperty(PropertyName = "tie_breaker")]
 		double? TieBreaker { get; set; }
 
+		[JsonProperty(PropertyName = "minimum_should_match")]
+		string MinimumShouldMatch { get; set; }
+
 		[JsonProperty(PropertyName = "operator")]
 		[JsonConverter(typeof(StringEnumConverter))]
 		Operator? Operator { get; set; }
@@ -78,6 +81,7 @@ protected override void WrapInContainer(IQueryContainer container)
 		public double? Boost { get; set; }
 		public bool? UseDisMax { get; set; }
 		public double? TieBreaker { get; set; }
+		public string MinimumShouldMatch { get; set; }
 		public Operator? Operator { get; set; }
 		public IEnumerable<PropertyPathMarker> Fields { get; set; }
 	}
@@ -109,6 +113,8 @@ public class MultiMatchQueryDescriptor<T> : IMultiMatchQuery where T : class
 
 		double? IMultiMatchQuery.TieBreaker { get; set; }
 
+		string IMultiMatchQuery.MinimumShouldMatch { get; set; }
+
 		Operator? IMultiMatchQuery.Operator { get; set; }
 
 		IEnumerable<PropertyPathMarker> IMultiMatchQuery.Fields { get; set; }
@@ -153,6 +159,7 @@ public MultiMatchQueryDescriptor<T> Query(string query)
 			((IMultiMatchQuery)this).Query = query;
 			return this;
 		}
+
 		public MultiMatchQueryDescriptor<T> Analyzer(string analyzer)
 		{
 			((IMultiMatchQuery)this).Analyzer = analyzer;
@@ -169,6 +176,12 @@ public MultiMatchQueryDescriptor<T> CutoffFrequency(double cutoffFrequency)
 			return this;
 		}
 
+		public MultiMatchQueryDescriptor<T> MinimumShouldMatch(string minimumShouldMatch)
+		{
+			((IMultiMatchQuery)this).MinimumShouldMatch = minimumShouldMatch;
+			return this;
+		}
+
 		public MultiMatchQueryDescriptor<T> Rewrite(RewriteMultiTerm rewrite)
 		{
 			((IMultiMatchQuery)this).Rewrite = rewrite;