tests: use core v0.67.0 docker image for the integration tests

[pedroferreira1]

Acceptance Criteria

• Use hathor core v0.67.0 docker image for the integration tests

Security Checklist

• Make sure you do not include new dependencies in the project unless strictly necessary and do not include dev-dependencies as production ones. More dependencies increase the possibility of one of them being hijacked and affecting us.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.77%. Comparing base (4294bb9) to head (4bda2ff).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #956      +/-   ##
==========================================
+ Coverage   84.76%   84.77%   +0.01%     
==========================================
  Files         112      112              
  Lines        8079     8079              
  Branches     1740     1740              
==========================================
+ Hits         6848     6849       +1     
+ Misses       1203     1202       -1     
  Partials       28       28              

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