Check fixed attributes (should be default?)

[skinkie]

netex_part_1/part1_networkDescription/netex_timingPattern_support.xsd:				<xsd:attribute name="nameOfPointRefClass" type="NameOfClass" use="optional" fixed="TimingPoint">
netex_part_1/part1_networkDescription/netex_activation_support.xsd:				<xsd:attribute name="nameOfPointRefClass" type="NameOfClass" use="optional" fixed="ActivationPoint">
netex_part_1/part1_networkDescription/netex_route_support.xsd:				<xsd:attribute name="nameOfPointRefClass" type="NameOfClass" use="optional" fixed="RoutePoint">
netex_part_1/part1_tacticalPlanning/netex_servicePattern_support.xsd:				<xsd:attribute name="nameOfPointRefClass" type="NameOfClass" use="optional" fixed="ScheduledStopPoint">