[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

Gen/LbEvtGen/EvtGenModels/EvtBnoCBpto3hpi0.hh

+//--------------------------------------------------------------------------
+//
+// Copyright Information: See EvtGen/COPYRIGHT
+//
+// Module: EvtBnoCBpto3hpi0
+//
+// Description: Model for generating flat phase space events in the charmless
+//              VV region. Necessary due to limitations with generator-level
+//              cuts in LoKi; inability to handle Bose-symmetric final states
+//              with PHOTOS
+//
+// Modification history:
+//
+//    Jeremy Dalseno     Mar 2020     Module created
+//
+//------------------------------------------------------------------------
+
+#ifndef EVTBNOCBPTO3HPI0_HH
+#define EVTBNOCBPTO3HPI0_HH
+
+#include <string>
+
+#include "EvtGenBase/EvtComplex.hh"
+#include "EvtGenBase/EvtDecayAmp.hh"
+
+class EvtParticle;
+
+class EvtBnoCBpto3hpi0 : public EvtDecayAmp {
+
+public:
+
+  EvtBnoCBpto3hpi0();
+
+  std::string getName() override
+  { return "BNOCBPTO3HPI0"; }
+
+  EvtDecayBase* clone() override
+  { return new EvtBnoCBpto3hpi0; }
+
+  void initProbMax() override
+  { setProbMax(1.0); }
+
+  void init() override;
+
+  void decay(EvtParticle* p) override;
+
+private:
+
+  bool _bose_symm;
+  double _m2hp_ll, _m2hp_ul; // Lower and upper (2h)+ invariant mass limits
+  double _m2h0_ll, _m2h0_ul; // Lower and upper (2h)0 invariant mass limits
+  EvtComplex _I;
+
+};
+
+#endif //EVTBNOCBPTO3HPI0_HH