Add hack to handle mondrian exception with logging proxy

[jrmi]

Refs

• django with celery raise an exception on LoggingProxy python-bonobo/bonobo#352
• Add hack to void conflict between celery LoggingProxy and mondrian visu-back#37
• Be more conservative on patching stdout and stderr python-mondrian/mondrian#18

[codecov]

Codecov Report

Merging #40 (459c90d) into master (27163a6) will decrease coverage by 0.49%.
The diff coverage is 60.00%.

@@            Coverage Diff             @@
##           master      #40      +/-   ##
==========================================
- Coverage   90.07%   89.58%   -0.50%     
==========================================
  Files          19       19              
  Lines         917      931      +14     
==========================================
+ Hits          826      834       +8     
- Misses         91       97       +6     

Impacted Files	Coverage Δ
django_geosource/models.py	96.99% <45.45%> (-1.35%)	⬇️
django_geosource/tasks.py	91.17% <100.00%> (+0.55%)	⬆️
django_geosource/views.py	100.00% <100.00%> (ø)

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