provide overload for generic mapping to forcefully NOT render a name property fix #384

Author: Mpdreamz

src/Nest.Tests.Unit/Core/Map/DynamicTemplates/DynamicTemplatesTests.cs

@@ -30,6 +30,11 @@ public void MultiFieldWithGenericTypes()
 										.Index("not_analyzed")
 										.Store()
 									)
+									.Generic(g => g
+										.Name("suggest", noNameProperty: true)
+										.Type("completion")
+										.IndexAnalyzer("default")
+									)
 								)
 							)
 						)

src/Nest.Tests.Unit/Core/Map/DynamicTemplates/MultiFieldWithGenericTypes.json

@@ -17,6 +17,10 @@
               "type": "{dynamic_type}",
               "store": "yes",
               "index": "not_analyzed"
+            },
+            "suggest": {
+              "type": "completion",
+              "index_analyzer": "default"
             }
           }
         }

src/Nest.Tests.Unit/Core/Map/FluentMappingFullExampleTests.cs

@@ -108,6 +108,12 @@ public void MapFluentFull()
 										.Index("not_analyzed")
 										.Store()
 									)
+									.Generic(g => g
+										.Name("do_no_render_name_property", noNameProperty: true)
+										.Type("{dynamic_type}")
+										.Index("not_analyzed")
+										.Store()
+									)
 								)							
 							)
 						)

src/Nest/Domain/Mapping/Descriptors/GenericMappingDescriptor.cs

@@ -8,16 +8,19 @@ public class GenericMappingDescriptor<T>
 	{
 		internal GenericMapping _Mapping = new GenericMapping();
 
-		public GenericMappingDescriptor<T> Name(string name)
+		public GenericMappingDescriptor<T> Name(string name, bool noNameProperty = false)
 		{
-			this._Mapping.Name = name;
+			if (!noNameProperty)
+				this._Mapping.Name = name;
+
 			this._Mapping.TypeNameMarker = name;
 			return this;
 		}
-		public GenericMappingDescriptor<T> Name(Expression<Func<T, object>> objectPath)
+		public GenericMappingDescriptor<T> Name(Expression<Func<T, object>> objectPath, bool noNameProperty = false)
 		{
 			var name = new PropertyNameResolver().ResolveToLastToken(objectPath);
-			this._Mapping.Name = name;
+			if (!noNameProperty)
+				this._Mapping.Name = name;
 			this._Mapping.TypeNameMarker = name;
 			return this;
 		}