fix: tests are generated in wrong directory

[Mohammad-Alavi]

Description

Functional tests are generated in the wrong directory. So they wont run if we try to run all tests using phpunit.xlm config.
This happened becasue @Mohammad-Alavi updated the test directory structure but forgot to update the code generator.
This PR fixed that problem and also update some test stubs.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• Refactor (refactoring a current feature, method, etc...)
• Code Coverage (adding/removing/updating/refactoring tests)
• New feature (non-breaking change which adds functionality)
• Remove feature (non-breaking change which removes functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)