Rename unit tests namespaces

[kbeaugrand]

Description

What's new?

• Change namespace name for unit tests

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Tests
• Other

[codecov]

Codecov Report

Merging #383 (bf23e68) into main (b1e1f0f) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #383   +/-   ##
=======================================
  Coverage   46.35%   46.35%           
=======================================
  Files         103      103           
  Lines        3126     3126           
=======================================
  Hits         1449     1449           
  Misses       1677     1677           

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