lisa.tests.hotplug: Fix HotplugRollback MRO
lisa.tests.hotplug: Fix HotplugRollback MRO

FIX

Inheriting from TestBundle should come last in order to override methods
provided by OptinalFtraceTestBundle & friends by the non-optional
variant.

ARM-software/lisa,credp/lisa,credp/lisa,ARM-software/lisa,credp/lisa,credp/lisa,ARM-software/lisa,ARM-software/lisa