[Futurev4] fix failing tests

• Test 1: GaussSys.gausssys Here, I had to change the test so that it accepts the minimum working configuration coming from Gaussino.
• Test 2: LoKiGen.jira_461 ROOTIO from HepMC3 caused namespace collision with HepMC. It'll be now commented out in Gaussino as there is no need for it yet.
• Test 3: LoKiGen.lokigen0 Same problem as above + it looks like LoKi has some problems with dereferencing HepMC.GenParticle(). For example, this GP(HepMC.GenParticle()) gives

static double LoKi::Dicts::FunCalls<HepMC3::GenParticle>::__call__(LoKi::Functor<shared_ptr<const HepMC3::GenParticle>,double>& fun, const shared_ptr<const HepMC3::GenParticle>& o) =>
    could not convert argument 2

• Test 4: GaussTracker.shortened_sensdet_name This test, in its current shape, won't work because the expected debug debug() << "Sens det shortened name " << name() << " -> " << detname << endmsg; has been moved to the construct() in GiGaMTG4SensDetFactory. I wonder, in fact, whether this test is going to be useful... update: This is a very specific configuration in order to trigger a debug message with a shortened name of the sensitive detector. In order to do so, in Gauss-on-Gaussino it will only be triggered by running construct() on the GiGaSensDetTracker.

needs Gaussino/Gaussino!18 (merged) @gcorti @dmuller

Phys/LoKiGen/src/GenParticles.cpp

@@ -1227,7 +1227,7 @@ LoKi::GenParticles::DecNode::operator()
     LoKi::ILoKiSvc* ls = lokiSvc() ;
     SmartIF<LHCb::IParticlePropertySvc> ppSvc ( ls ) ;
     StatusCode sc = m_node.validate ( ppSvc ) ;
-    Assert ( sc.isSuccess() , "Unable to valiedate the node!" ) ;
+    Assert ( sc.isSuccess() , "Unable to validate the node!" ) ;
   }
   // use the node for evaluation
   return m_node.node ( LHCb::ParticleID ( p->pdg_id() ) ) ;