Fix problem ID and output in benchmark collection tests

[dweindl]

• Reference value wasn't found for Fiedler_BMCSystBiol2016, because it was recently renamed
• Print all rows from gradient check results

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.75%. Comparing base (f5fa6cd) to head (4661ee2).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #2570   +/-   ##
========================================
  Coverage    77.75%   77.75%           
========================================
  Files          325      325           
  Lines        21857    21857           
  Branches      1473     1473           
========================================
  Hits         16996    16996           
  Misses        4834     4834           
  Partials        27       27           

Flag	Coverage Δ
cpp	73.63% <ø> (ø)
cpp_python	34.20% <ø> (ø)
petab	37.07% <ø> (ø)
python	72.41% <ø> (ø)

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