[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

Sim/Gauss/python/Gauss/Physics.py

@@ -180,13 +180,13 @@ class G4Physics(LHCbConfigurableUser):
     def AddLHCbPhysics(self, pl):
         lhcbPhys = self.getProp('LHCbPhys')
         richUpgradeConfig = self.getProp('RichUpgradeConfig')
+        pl.PhysicsConstructors.append("GiGaPhysUnknownParticles")
         if lhcbPhys:
             log.info("Applying LHCb specific physics.")
             if richUpgradeConfig:
                 self.defineRichMaPmtPhys(pl)
             else:
                 self.defineRichPhys(pl)
-            pl.PhysicsConstructors.append("GiGaMTPhysUnknownParticles")
         else:
             log.warning("The lhcb-related physics (RICH processed,"
                         "UnknownParticles) is disabled")