To take into account the change in TMath::Erf generate a new reference file stressRooFit_ref_2.root used by versions >=519 and restore the old reference file for previous versions.
To take into account the change in TMath::Erf generate a new reference file
stressRooFit_ref_2.root used by versions >=519 and restore the old reference file
for previous versions.


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@22649 27541ba8-7e3a-0410-8455-c3a389f83636

bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,dawehner/root,dawehner/root,dawehner/root,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,bbannier/ROOT,dawehner/root,dawehner/root,dawehner/root,dawehner/root,dawehner/root