K2Node_CallParentFunction has incorrect tooltip when duplicating a BP

The code executes correctly at runtime, but the tooltip is incorrect. There is logic applied in CallFunctionHandler.cpp that handles the runtime execution, but that logic is missing the the tooltip. 

1. Create a BP "Bar"
2. Create a child BP "Foo"
3. Open "Foo" and notice that construction script target is correct (Target is Bar)
4. Duplicate "Foo" into "Foo1"
5. Open "Foo1" and notice that the construction script target is incorrect (Target is Foo1)