changed default values of read_result

[PaulJonasJost]

This way it still loads everything given no arguments, but only loads desired values if anything is specified.

[dilpath]

Thanks!

[codecov-commenter]

Codecov Report

Merging #649 (518c8ce) into develop (160c2a8) will increase coverage by 1.67%.
The diff coverage is 87.30%.

@@             Coverage Diff             @@
##           develop     #649      +/-   ##
===========================================
+ Coverage    88.16%   89.84%   +1.67%     
===========================================
  Files           79       93      +14     
  Lines         5257     5958     +701     
===========================================
+ Hits          4635     5353     +718     
+ Misses         622      605      -17     

Impacted Files	Coverage Δ
pypesto/ensemble/covariance_analysis.py	18.36% <0.00%> (-0.39%)	⬇️
pypesto/optimize/__init__.py	100.00% <ø> (ø)
pypesto/objective/amici.py	85.56% <20.00%> (-4.27%)	⬇️
pypesto/predict/task.py	43.75% <43.75%> (ø)
pypesto/petab/__init__.py	63.63% <50.00%> (ø)
pypesto/objective/amici_util.py	84.21% <66.66%> (+8.31%)	⬆️
pypesto/engine/mpi_pool.py	68.18% <68.18%> (ø)
pypesto/ensemble/constants.py	91.30% <71.42%> (-8.70%)	⬇️
pypesto/visualize/misc.py	82.41% <72.22%> (-2.52%)	⬇️
pypesto/store/read_from_hdf5.py	91.47% <78.94%> (+33.57%)	⬆️
... and 65 more

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