Update tests for new version of aiida-core

[PhilippRue]

AiiDA-core version is part of the caching files and thus these need to be recreated

[PhilippRue]

Only fix tests where caching works, others are deactivated (see issue #143)

[codecov]

Codecov Report

Attention: 208 lines in your changes are missing coverage. Please review.

Comparison is base (f6814ab) 68.07% compared to head (dd7ef25) 54.04%.
Report is 45 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff              @@
##           develop     #142       +/-   ##
============================================
- Coverage    68.07%   54.04%   -14.04%     
============================================
  Files           99      100        +1     
  Lines        14007    14006        -1     
============================================
- Hits          9535     7569     -1966     
- Misses        4472     6437     +1965     

Files	Coverage Δ
aiida_kkr/__init__.py	100.00% <100.00%> (ø)
aiida_kkr/cmdline/visualization/__init__.py	29.72% <100.00%> (ø)
aiida_kkr/parsers/kkr.py	64.60% <100.00%> (+2.10%)	⬆️
aiida_kkr/parsers/kkrimp.py	88.05% <100.00%> (+30.78%)	⬆️
aiida_kkr/tools/__init__.py	90.00% <100.00%> (+0.52%)	⬆️
aiida_kkr/tools/find_parent.py	91.66% <100.00%> (+2.19%)	⬆️
aiida_kkr/tools/tools_kkrimp.py	73.70% <100.00%> (+0.49%)	⬆️
tests/tools/test_find_parent.py	100.00% <100.00%> (ø)
aiida_kkr/workflows/jijs.py	82.26% <66.66%> (-2.96%)	⬇️
aiida_kkr/calculations/kkrimp.py	55.31% <75.00%> (+4.55%)	⬆️
... and 11 more

... and 12 files with indirect coverage changes

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