Update to RestAssured 5 and Spock(Groovy 4)

[Mjl33]

No description provided.

[codecov]

Codecov Report

Merging #372 (b85d150) into master (a563a5f) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #372   +/-   ##
=========================================
  Coverage     49.10%   49.10%           
  Complexity      477      477           
=========================================
  Files           116      116           
  Lines          2849     2849           
  Branches        170      170           
=========================================
  Hits           1399     1399           
  Misses         1364     1364           
  Partials         86       86           

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