Update for DsPi Run 2 analysis
The merge request:
- updates existing configuration files for Delta m_s analysis,
- adds missing config files (for misID fits, sFit),
- fixes small bugs in Ipatia + JohnsonSU
- allows usage of Ipatia + JohnsonSU for Bd->Dspi/K bkgs,
- updates sFit for simultaneous fit and Run 2 usage.