Removed dep from configuration package in DiscoveryManager

[cmaglie]

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• The PR follows
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• 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?

Just a small code refactoring.

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

All modified and coverable lines are covered by tests ✅

Project coverage is 69.48%. Comparing base (0d86bf5) to head (999d73b).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2568   +/-   ##
=======================================
  Coverage   69.47%   69.48%           
=======================================
  Files         205      205           
  Lines       20203    20204    +1     
=======================================
+ Hits        14037    14038    +1     
  Misses       5045     5045           
  Partials     1121     1121           

Flag	Coverage Δ
unit	69.48% <100.00%> (+<0.01%)	⬆️

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[cmaglie]

Related to #2565