ml tests for dga detection

[YellowMan02]

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Describe changes:
added tests with 2 different machine learning models to address dga detection.

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[utoni]

Thanks for the PR!
Could you please add the files to EXTRA_DIST so they will be included when running make dist. :)