#341 - Add elastic search to github integration tests

[michael-82]

• add and enable elastic search in docker compose for github actions
• add some basic tests to check if elasticsearch is up and usable

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.60%. Comparing base (4558da6) to head (e292855).
Report is 2 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop     #385   +/-   ##
==========================================
  Coverage      78.60%   78.60%           
  Complexity       551      551           
==========================================
  Files            136      136           
  Lines           2407     2407           
  Branches         147      147           
==========================================
  Hits            1892     1892           
  Misses           457      457           
  Partials          58       58           

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