Use atomic for counters in MuonSegmentTagTool

http://goetz.web.cern.ch/goetz/mutable_2019-07-13.html#Muon,MuGirl_Other

nightly/master/2019-07-13T2149:Reconstruction/MuonIdentification/MuonCombinedBaseTools/src/MuonSegmentTagTool.h +89

    87	
    88	    MSSurfaces*   m_surfaces;     //!< Pointer to a set of abstract surfaces describing MuonSpectrometer levels.
    89	    mutable unsigned int  m_ntotTracks;
    90	    mutable unsigned int  m_nangleMatch;
    91	    mutable unsigned int  m_npmatch;
nightly/master/2019-07-13T2149:Reconstruction/MuonIdentification/MuonCombinedBaseTools/src/MuonSegmentTagTool.h +90

    88	    MSSurfaces*   m_surfaces;     //!< Pointer to a set of abstract surfaces describing MuonSpectrometer levels.
    89	    mutable unsigned int  m_ntotTracks;
    90	    mutable unsigned int  m_nangleMatch;
    91	    mutable unsigned int  m_npmatch;
    92	    mutable unsigned int  m_natMSEntrance;
nightly/master/2019-07-13T2149:Reconstruction/MuonIdentification/MuonCombinedBaseTools/src/MuonSegmentTagTool.h +91

    89	    mutable unsigned int  m_ntotTracks;
    90	    mutable unsigned int  m_nangleMatch;
    91	    mutable unsigned int  m_npmatch;
    92	    mutable unsigned int  m_natMSEntrance;
    93	    mutable unsigned int  m_naccepted;
nightly/master/2019-07-13T2149:Reconstruction/MuonIdentification/MuonCombinedBaseTools/src/MuonSegmentTagTool.h +92

    90	    mutable unsigned int  m_nangleMatch;
    91	    mutable unsigned int  m_npmatch;
    92	    mutable unsigned int  m_natMSEntrance;
    93	    mutable unsigned int  m_naccepted;
    94	    mutable std::vector<int> m_extrapolated;
nightly/master/2019-07-13T2149:Reconstruction/MuonIdentification/MuonCombinedBaseTools/src/MuonSegmentTagTool.h +93

    91	    mutable unsigned int  m_npmatch;
    92	    mutable unsigned int  m_natMSEntrance;
    93	    mutable unsigned int  m_naccepted;
    94	    mutable std::vector<int> m_extrapolated;
    95	    mutable std::vector<int> m_goodExtrapolated;
nightly/master/2019-07-13T2149:Reconstruction/MuonIdentification/MuonCombinedBaseTools/src/MuonSegmentTagTool.h +94

    92	    mutable unsigned int  m_natMSEntrance;
    93	    mutable unsigned int  m_naccepted;
    94	    mutable std::vector<int> m_extrapolated;
    95	    mutable std::vector<int> m_goodExtrapolated;
    96	
nightly/master/2019-07-13T2149:Reconstruction/MuonIdentification/MuonCombinedBaseTools/src/MuonSegmentTagTool.h +95

    93	    mutable unsigned int  m_naccepted;
    94	    mutable std::vector<int> m_extrapolated;
    95	    mutable std::vector<int> m_goodExtrapolated;
    96	
    97	  };

RunTier0Tests.py was fine. RunTier0Tests.log