HYBRID_NEWKF z0 resolution in barrel is worse than HYBRID

[tschuh]

The HYBRID_NEWKF emulator sees a z0 resolution of 1.5 mm in the barrel for ttbar@200PU events, even when recalculating the Tracklet helix parameters and Tracklet stub residuals from the TTStubs so as to bypass this unsolved issue #150 . It is not understood why this is worse than the corresponding z0 resolution of the the HYBRID simulation, which reaches 1mm. We need to solve this.