Fix incorrect HasAny() condition for fielddata fields

Author: gmarz

src/Nest/DSL/Search/InnerHitsDescriptor.cs

@@ -102,7 +102,7 @@ public InnerHitsDescriptor<T> Name(string name)
 
 		public InnerHitsDescriptor<T> FielddataFields(params string[] fielddataFields)
 		{
-			if (fielddataFields.HasAny())
+			if (!fielddataFields.HasAny())
 				return this;
 			Self.FielddataFields = fielddataFields.Select(f => (PropertyPathMarker)f).ToList();
 			return this;

src/Nest/DSL/SearchDescriptor.cs

@@ -629,7 +629,7 @@ public SearchDescriptor<T> Fields(params string[] fields)
 		///</summary>
 		public SearchDescriptor<T> FielddataFields(params string[] fielddataFields)
 		{
-			if (fielddataFields.HasAny())
+			if (!fielddataFields.HasAny())
 				return this;
 			Self.FielddataFields = fielddataFields.Select(f => (PropertyPathMarker)f).ToList();
 			return this;