Resubmit 'bs2tautau-LM'
b2stautau-LM
See merge request !130 (merged)
(cherry picked from commit 0b2cbc21)
0b4045bf Add stage0 yaml (need to confirm years) ca3f0398 Update b2stautau/request.stage0.yaml
Resubmitting (again) due to memory consumption issues: https://its.cern.ch/jira/browse/LHCBGAUSS-2828
*First resubmission did not contain bugfix.