Phys/LoKiCore: fix for LoKiCore.test_contains

Phys/LoKiCore: fix for LoKiCore.test_contains

Fix in LoKi::VoidFilter and LoKi::Hybrid::Base It fixes the following problem, exposed by gaudi/Gaudi!462 (merged):

terminate called after throwing an instance of 'GaudiException'
  what():  Cannot discard legacy handle after data dependency collection

@cattanem @graven