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
What is the expected effect of this change (it seems it is the only one that is non-trivial?)?