XSD file does not validate

For jgroups' XML config file validation XSD schema files are provided on the jgroups website. But unfortunately the XSD files themselves don't validate as they contain duplicate attribute entries for "max_retransmit_time". Those duplicates should be removed.

File: http://www.jgroups.org/schema/JGroups-3.3.xsd
Duplicates in lines: 2209, 3615, 4310

File: http://www.jgroups.org/schema/JGroups-3.4.xsd
Duplicates in lines: 620, 1990, 5453