Move to more modern Starterkit Bs -> Jpsi Phi line in HltEfficiencyChecker examples
Goes with Moore!2259 (merged).
The legacy Hlt2BsToJpsiPhi
is based on LoKi and therefore being removed, so this MR mainly updates to use the more modern Starterkit version of this line.
Addresses one half of Moore#469 (closed) (Moore!2248 (merged) will do the rest), and closes #38 (closed).
Edited by Ross John Hunter