Fixed integration test

[cmaglie]

Please check if the PR fulfills these requirements

See how to contribute

• The PR has no duplicates (please search among the Pull Requests
  before creating one)
• The PR follows
  our contributing guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• UPGRADING.md has been updated with a migration guide (for breaking changes)
• configuration.schema.json updated if new parameters are added.

What kind of change does this PR introduce?

Fixed integration test by removing dependency on external core.

What is the current behavior?

What is the new behavior?

Does this PR introduce a breaking change, and is titled accordingly?

Other information

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +0.02 🎉

Comparison is base (ad9ddb8) 62.49% compared to head (e80cd1f) 62.51%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2164      +/-   ##
==========================================
+ Coverage   62.49%   62.51%   +0.02%     
==========================================
  Files         223      223              
  Lines       19472    19462      -10     
==========================================
- Hits        12169    12167       -2     
+ Misses       6205     6201       -4     
+ Partials     1098     1094       -4     

Flag	Coverage Δ
unit	62.51% <ø> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

see 2 files with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.