Fix: Do not create entity manager in setUp()

[localheinz]

This PR

• stops creating the EntityManager in setUp()

[codecov]

Codecov Report

Merging #21 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master      #21   +/-   ##
=========================================
  Coverage     74.22%   74.22%           
  Complexity       80       80           
=========================================
  Files             8        8           
  Lines           194      194           
=========================================
  Hits            144      144           
  Misses           50       50

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