Remove mutable/ setters() const from TrackInfo

The track Info was carrying 4 mutables allowing for this pattern.

note the setter() const pattern

0302 /**
0303  *  Method re-setting the ParticleHypothesis
0304  */  
0305    void setParticleHypothesis(const ParticleHypothesis& hypothesis) const;

0367 /**                           
0368  * A bitset providing information on the properties    
0369  * of the track.                                      
0370  */                             
0371     mutable  std::bitset<NumberOfTrackProperties>     m_properties;

This is not playing well in a MT environment. Fix this and modify some of the clients I could see in an immediate way.

Mentiong @mhodgkin (with whom we discussed this a bit) and @goetz as this appears in the reco Integration list of mutables to be fixed.