Hit assoc fix

This change is to restore the hit residuals in relMon that were broken at CMSSW_6_2_0_pre8 as a side effect of the revised tracking particles.  A branch in the code that was already in place for pixels is now executed for the strips as well.  This branch doesn't depend on the (broken) crossing-frame pointers of the digiSimLinks.  Modified files:
SimTracker / TrackerHitAssociation / interface / TrackerHitAssociator.h
SimTracker / TrackerHitAssociation / src / TrackerHitAssociator.cc