Improved tests

[mickaelandrieu]

Please take the time to edit the "Answers" rows with the necessary information:

Questions	Answers
Branch?	develop
Description?	Improved the tests architecture
Type?	improvement
Category?	BO
BC breaks?	no
Deprecations?	no
Fixed ticket?	no
How to test?	Launch the tests, but travis always prove this is working as expected

Old architecture:

tests
├── bootstrap.php
├── check_php_parse_errors.sh
├── composer.json.travis
├── composer.lock.travis
├── Fake
├── Helper
├── index.php
├── Integration
├── js
├── module_testing
├── parameters.yml.travis
├── phpunit.xml
├── resources
├── selenium
├── TestCase
├── travis-ci-apache-vhost
└── Unit

new one:

tests
├── bootstrap.php
├── check_php_parse_errors.sh
├── composer.json.travis
├── composer.lock.travis
├── index.php
├── Integration
├── parameters.yml.travis
├── phpunit.xml
├── resources
├── Selenium
├── TestCase
├── travis-ci-apache-vhost
└── Unit

[mickaelandrieu]

thank you for review @julienbourdeau