[4.2] Validate passwords more safely

As requested.
Short array syntax
Simplify ClassLoader
Merge pull request #5205 from lucasmichot/4.2-class-loader

[4.2] Support/ClassLoader : simplify add and remove directory
Testing scrutinizer config file.
Merge pull request #5151 from KennedyTedesco/4.2-password-broker

[4.2] Validate passwords more safely
Add excluded paths.
Remove file.
Avoid using fully qualified names within the code