New config files for b-tagging

All Cfg() files written for new configuration

Make some tools used by bTagging private:

• InDetDetailedTrackSelectorTool.cxx
• TrackSummaryTool.cxx
• KalmanVertexOnJetAxisSmoother.cxx
• TrkVKalVrtFitter.cxx

BTaggingFlags.OutputLevel is not used in new config files (ATLASRECTS-2999)

Introduce popToolsAndMerge in ComponentAccumulator

Redesign AtlasExtrapolatorConfig.py