bau: ShibIntIdP3/IdP4compat: bump IdP version to 4.2.1
bau: ShibIntIdP3/IdP4compat: bump IdP version to 4.2.1

Update all dependencies to match IdP 4.2.1 (OpenSAML is 4.2.0)

Also update Tomcat API to 8.5.78

REANNZ/AAF-VHO,REANNZ/AAF-VHO,REANNZ/AAF-VHO