[CTT] ServerTest/NodeIDs/Events/TriggerNodes should be present in the defaul UAReferenceServer.ctt.xml

ServerTest/NodeIDs/Events/TriggerNodes should be present in the defaul UAReferenceServer.ctt.xml

Those are needed for multiple TestCases in the BaseInformation CU.

https://github.com/OPCFoundation/UA-.NETStandard/blob/master/Applications/UAReferenceServer.ctt.xml

> Node that will invoke an event (of any kind) whenever it is written
> to.

