Dst->D0Aprime_AprimeToEE which superseeds (!726)

New MR to produce Dst0->D0Aprime after debugging the previous MR !726 (merged) related to multiple input files. The bug was fixed after implementing the creation of the root file in the Ntuple class in RECREATE mode.

In addition, the yaml file was modified to allow same-sign SS and opposite-sign OS electrons.