Cleanup of btag configuration files

Cleanup of the btag configuration files with more consistent naming convention for different modules and taggers. Config files now also follow more closely the cfi and cff file guidelines described in https://twiki.cern.ch/twiki/bin/view/CMSPublic/SWGuideAboutPythonConfigFile
This is mostly to be consistent with the new jet cone size of 0.4. In practice, the effect should be negligible since most reconstructed secondary vertices are well within dR of 0.4.