Fix 1209

[PaulJonasJost]

Closes #1209. Happens due to amici not correctly calculating the initial jacobin and bad error handling of scipy.

[dweindl]

Thanks. A potentially cleaner solution would be using checked startpoints (problem = importer.create_problem(obj, startpoint_kwargs={'check_fval': True, 'check_grad': True})).

[codecov-commenter]

Codecov Report

Attention: 404 lines in your changes are missing coverage. Please review.

Comparison is base (160c2a8) 88.16% compared to head (aacccd0) 83.95%.
Report is 447 commits behind head on develop.

Files	Patch %	Lines
pypesto/ensemble/ensemble.py	69.36%	68 Missing ⚠️
...ypesto/hierarchical/spline_approximation/solver.py	83.68%	47 Missing ⚠️
pypesto/ensemble/util.py	65.13%	38 Missing ⚠️
pypesto/history/base.py	84.76%	32 Missing ⚠️
pypesto/hierarchical/optimal_scaling/solver.py	93.53%	26 Missing ⚠️
pypesto/hierarchical/petab.py	84.56%	23 Missing ⚠️
pypesto/engine/mpi_pool.py	0.00%	22 Missing ⚠️
pypesto/hierarchical/inner_calculator_collector.py	89.04%	16 Missing ⚠️
...pesto/hierarchical/spline_approximation/problem.py	89.18%	16 Missing ⚠️
pypesto/hierarchical/optimal_scaling/calculator.py	75.86%	14 Missing ⚠️
... and 19 more

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Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1216      +/-   ##
===========================================
- Coverage    88.16%   83.95%   -4.22%     
===========================================
  Files           79      148      +69     
  Lines         5257    11830    +6573     
===========================================
+ Hits          4635     9932    +5297     
- Misses         622     1898    +1276     

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