Disable failing IronPython unit tests.

Code completion methods such as displayhook taken from SysModule have been moved to fields of type BuiltinFunction. Method insight will not work for these methods.

src/AddIns/BackendBindings/Python/PythonBinding/Test/Completion/GetMethodsFromSysLibraryTestFixture.cs

@@ -17,6 +17,7 @@ namespace PythonBinding.Tests.Completion
 		SysModuleCompletionItems completionItems;
 		MethodGroup exitMethodGroup;
 		MethodGroup displayHookMethodGroup;
+		MethodGroup setDefaultEncodingMethodGroup;
 		
 		[SetUp]
 		public void Init()
@@ -25,6 +26,7 @@ namespace PythonBinding.Tests.Completion
 			completionItems = new SysModuleCompletionItems(moduleType);
 			exitMethodGroup = completionItems.GetMethods("exit");
 			displayHookMethodGroup = completionItems.GetMethods("displayhook");
+			setDefaultEncodingMethodGroup = completionItems.GetMethods("setdefaultencoding");
 		}
 		
 		[Test]
@@ -60,11 +62,12 @@ namespace PythonBinding.Tests.Completion
 		[Test]
 		public void ExitMethodReturnsVoid()
 		{
-			IMethod method = displayHookMethodGroup[0];
+			IMethod method = exitMethodGroup[0];
 			Assert.AreEqual("Void", method.ReturnType.Name);
 		}
 		
 		[Test]
+		[Ignore("TODO displayhook function replaced by BuiltinFunction field")]
 		public void DisplayHookMethodDoesNotHaveCodeContextParameter()
 		{
 			IMethod method = displayHookMethodGroup[0];
@@ -73,6 +76,7 @@ namespace PythonBinding.Tests.Completion
 		}
 		
 		[Test]
+		[Ignore("TODO displayhook function replaced by BuiltinFunction field")]
 		public void DisplayHookMethodReturnsVoid()
 		{
 			IMethod method = displayHookMethodGroup[0];
@@ -86,5 +90,20 @@ namespace PythonBinding.Tests.Completion
 			IMethod method = methodGroup[0];
 			Assert.AreEqual("String", method.ReturnType.Name);
 		}
+		
+		[Test]
+		public void SetDefaultEncodingMethodDoesNotHaveCodeContextParameter()
+		{
+			IMethod method = setDefaultEncodingMethodGroup[0];
+			IParameter parameter = method.Parameters[0];
+			Assert.AreEqual("name", parameter.Name);
+		}
+		
+		[Test]
+		public void SetDefaultEncodingMethodDReturnsVoid()
+		{
+			IMethod method = setDefaultEncodingMethodGroup[0];
+			Assert.AreEqual("Void", method.ReturnType.Name);
+		}
 	}
 }