reduce noise from FitPrintService
Much space in our test logs is taken by fit progress reports like
517:
517: FitPrintService::update -> Info. NCall:6 Chi2:3.11538944e-02
517: Wall time since last call:0.00
517: height 4.500000e+00 free 4.495500e+00
517: radius 5.500000e+00 free 5.500000e+00
517:
If this needed at all, then a tabular form would be preferable.
Also consider:
- make code more similar to ProgressHandler
- add variable to print only at each n-th iteration
- document how to switch off, or change the output