[RF] rootbench-benchJohnson fills log with "use fixCoefNormalization!" #7639
Description
Describe the bug
Run rootbench's rootbench-benchJohnson and you will see plenty of
[#0] WARNING:Eval -- Evaluating RooAddPdf without a defined normalization set. This can lead to ambiguos coefficients definition and incorrect results. Use RooAddPdf::fixCoefNormalization(nset) to provide a normalization set for defining uniquely RooAddPdf coefficients!
Expected behavior
No warnings.
To Reproduce
ctest -V -R rootbench-benchJohnson
Setup
Linux, master