Explicitly tune new BTaggingTool for Stripping Tests

This MR contains a patch to get the stripping nightlies running. The new BTaggingTool currently needs to be configured explicitly which is done in this patch.

This MR is part of the latest Flavour Tagging refactoring (see Analysis!316 (closed) and Phys!216 (merged)). Ping @erodrigu @bkhanji @sakar @mschille @sreicher here.