Change connexion pinning in test-env

[janash]

This PR changes the pinning for the connexion package so that the version is greater than 2.7

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 46.62%. Comparing base (104b355) to head (a6903bd).
Report is 7 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #152   +/-   ##
=======================================
  Coverage   46.62%   46.62%           
=======================================
  Files          35       35           
  Lines        2074     2074           
=======================================
  Hits          967      967           
  Misses       1107     1107           

Flag	Coverage Δ
unittests	46.62% <ø> (ø)

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