RooAbsReal: recognize RooFit::Minimizer in chi2FitTo, pass on full RooFit::Optimize setting
RooAbsReal: recognize RooFit::Minimizer in chi2FitTo, pass on full RooFit::Optimize setting

Signed-off-by: Wouter Verkerke <a828b442a61dc068271c4de5e7263419bac2b4a3@nikhef.nl>

Dr15Jones/root,Dr15Jones/root,tc3t/qoot,Dr15Jones/root,kirbyherm/root-r-tools,Dr15Jones/root,tc3t/qoot,tc3t/qoot,tc3t/qoot,kirbyherm/root-r-tools,kirbyherm/root-r-tools,tc3t/qoot,Dr15Jones/root,tc3t/qoot,kirbyherm/root-r-tools,tc3t/qoot,tc3t/qoot,Dr15Jones/root,kirbyherm/root-r-tools,kirbyherm/root-r-tools,kirbyherm/root-r-tools,tc3t/qoot,tc3t/qoot,Dr15Jones/root