Added flag to MethodInfoBasedNodeTypeRegistry.GetRegisterableMethodDefinition(...) to select how to handle ambiguous method definitions on geniric types
Description
When calling MethodInfoBasedNodeTypeRegistry.GetRegisterableMethodDefinition(...), a flag must now be provided which specifies whether to throw a NotSupportedException or return null in case that the method cannot be resolved. Method resolution can fail if the method is part of a generic type, has at least one overload, and can only be distiguished via the generic type's parameter.
