added new tagging variables and new version of CombinedSVComputer
minor fixes
combined CSVV2+SL tagger
changes needed or combined CSVV2_SL tagger
if-else instead of ifs and removing the unneeded exception
use selectedTracks, trackQuality 'any', define trackJetPt, use std::copy in MVAComputer.cc
updated definition of track-based pt
fix double usage of seeding track
modify configuration files in such a way that standard CSV is not affected
less error-prone implementation
alignment fixed
redefine var.multiplicity = 0
Merge pull request #3795 from cms-btv-pog/newMVAtaggers_backport_from_71X_to_53X

New mva taggers backport from 71X to 53X