use selectedTracks, trackQuality 'any', define trackJetPt, use std::copy in MVAComputer.cc

- fix std::copy issue in PhysicsTools/MVAComputer/src/MVAComputer.cc 
# ---> discussed in pull request https://github.com/cms-sw/cmssw/pull/2622#discussion-diff-10593815
- remove leptonP0Par in CombinedSVSoftLeptonComputer, because it is empty
# ---> cleaning
- implement track-based jet pt in 53X in CombinedSVSoftLeptonComputer and CombinedSVComputerV2 based on ipInfo.selectedTracks() 
# ---> extensively discussed in btv meetings and announced https://twiki.cern.ch/twiki/bin/viewauth/CMS/CMSSW_7_1_0 
# ---> for compilation this needs https://github.com/cms-sw/cmssw/pull/2941 that is already merged but not available in any prerelease
- use selectedTracks in CombinedSVSoftLeptonComputer and CombinedSVComputerV2 and CombinedSVComputer 
- change trackMultiplicityMin in configuration files of CombinedSVSoftLeptonComputer and CombinedSVV2Computer & CombinedSVComputer
- change trackQuality in configuration files to 'any' instead of 'highPurity'
# ---> previous 3 changes discussed & presented in https://indico.cern.ch/event/312306/session/1/contribution/10/material/slides/0.pdf