Fix elasticsearch connection setup for celery workers

[OskarPersson]

No description provided.

[codecov]

Codecov Report

Merging #965 into master will increase coverage by 0.04%.
The diff coverage is 41.66%.

@@            Coverage Diff            @@
##           master    #965      +/-   ##
=========================================
+ Coverage   62.65%   62.7%   +0.04%     
=========================================
  Files         212     212              
  Lines       20305   20316      +11     
  Branches     2448    2449       +1     
=========================================
+ Hits        12723   12740      +17     
+ Misses       7146    7137       -9     
- Partials      436     439       +3

Flag	Coverage Δ
#backend	62.7% <41.66%> (+0.04%)	⬆️

Impacted Files	Coverage Δ
ESSArch_Core/configuration/models.py	90.37% <100%> (ø)	⬆️
ESSArch_Core/ip/tasks.py	58.62% <28.57%> (-0.62%)	⬇️
ESSArch_Core/ip/models.py	74.23% <50%> (-0.12%)	⬇️
ESSArch_Core/auth/util.py	90% <0%> (-2.23%)	⬇️
ESSArch_Core/api/filters.py	86.86% <0%> (-2.03%)	⬇️
ESSArch_Core/configuration/views.py	83.46% <0%> (-1.58%)	⬇️
ESSArch_Core/util.py	72.26% <0%> (+0.42%)	⬆️
ESSArch_Core/auth/views.py	74.03% <0%> (+1.92%)	⬆️
ESSArch_Core/auth/signals.py	72.44% <0%> (+3.93%)	⬆️
ESSArch_Core/frontend/__init__.py	100% <0%> (+25%)	⬆️
... and 1 more

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