b2pipimumu_angular analysis (supersedes !1050 )
WG: RD
Added nTracks information into GenLevel MC samples required for background modelling.
Samples are Bd2Jpsietap and Bd2JpsiKst (& Bd2Kpimumu) (with Kstr0 as pi pi).
This supersedes previous MR !1050 (merged), as the samples didn't have tracking information. The superseded ntuples have been archived by myself already, they can be deleted immediately if required (only the 28 samples produced in MR !1050 (merged), version v0r0p7051050)
Edited by J Alexander Ward