Fix setting up logging hierarchy, fixes #1882

[maxnoe]

No description provided.

[codecov]

Codecov Report

Merging #1883 (067752b) into master (0612a33) will increase coverage by 0.01%.
The diff coverage is 95.83%.

@@            Coverage Diff             @@
##           master    #1883      +/-   ##
==========================================
+ Coverage   92.04%   92.05%   +0.01%     
==========================================
  Files         189      189              
  Lines       14842    14862      +20     
==========================================
+ Hits        13661    13681      +20     
  Misses       1181     1181              

Impacted Files	Coverage Δ
ctapipe/core/tests/test_component.py	97.83% <95.00%> (-0.23%)	⬇️
ctapipe/core/component.py	97.64% <100.00%> (+1.17%)	⬆️
ctapipe/core/tool.py	93.39% <100.00%> (+0.03%)	⬆️

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[maxnoe]

@kosack Sorry, it has to come before super().__init__() to enable using the log in traitlets observers, as it is used in the examples. Remove the self. works though.