[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/CMakeLists.txt

 ###############################################################################
-# (c) Copyright 2000-2018 CERN for the benefit of the LHCb Collaboration      #
+# (c) Copyright 2000-2020 CERN for the benefit of the LHCb Collaboration      #
 #                                                                             #
 # This software is distributed under the terms of the GNU General Public      #
 # Licence version 3 (GPL Version 3), copied verbatim in the file "COPYING".   #
@@ -8,9 +8,6 @@
 # granted to it by virtue of its status as an Intergovernmental Organization  #
 # or submit itself to any jurisdiction.                                       #
 ###############################################################################
-################################################################################
-# Package: LoKiGen
-################################################################################
 gaudi_subdir(LoKiGen)
 
 find_package(Graphviz) 
@@ -30,8 +27,7 @@ gaudi_add_module(LoKiGen
 gaudi_add_dictionary(LoKiGen
                      dict/LoKiGenDict.h
                      dict/LoKiGen.xml
-                     LINK_LIBRARIES GenEvent LoKiCoreLib LoKiGenLib
-                     OPTIONS " -U__MINGW32__ ")
+                     LINK_LIBRARIES GenEvent LoKiCoreLib LoKiGenLib)
 
 if(GAUDI_BUILD_TESTS)
   gaudi_add_executable(GenDecayGrammarTest