minor #2635 ProjectCodeTest - watch that all classes have dedicated tests (keradus)
minor #2635 ProjectCodeTest - watch that all classes have dedicated tests (keradus)

This PR was squashed before being merged into the 2.2-dev branch (closes #2635).

Discussion
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ProjectCodeTest - watch that all classes have dedicated tests

inspired by #2600

Commits
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5c4b693 ProjectCodeTest - watch that all classes have dedicated tests

Slamdunk/PHP-CS-Fixer,SpacePossum/PHP-CS-Fixer,kubawerlos/PHP-CS-Fixer,GrahamCampbell/PHP-CS-Fixer,kubawerlos/PHP-CS-Fixer,lucasmichot/PHP-CS-Fixer,Slamdunk/PHP-CS-Fixer,SpacePossum/PHP-CS-Fixer,GrahamCampbell/PHP-CS-Fixer,lucasmichot/PHP-CS-Fixer,keradus/PHP-CS-Fixer,FriendsOfPHP/PHP-CS-Fixer,Soullivaneuh/PHP-CS-Fixer,Soullivaneuh/PHP-CS-Fixer,keradus/PHP-CS-Fixer,gharlan/PHP-CS-Fixer,FriendsOfPHP/PHP-CS-Fixer,gharlan/PHP-CS-Fixer