* Update disco fixtures now we have partitions
* Add virtual-admin-6 fixture with partition 'redirects' and failovers
* Properly cope with extra partition segment for splitters and resolvers
* Make 'redirects' and failovers look/act consistently
* Fixup some unit tests
This commit fixes a problem where parent Failovers where not showing (subset children were fine).
Seems to have been introduced with a move/glimmer upgrade here #9154 so I'm adding a 1.9.x backport.