Setup SonarQube for GLPI
We need to configure the CI to run Sonar Scanner on GLPI.
Some information can be found in CONTRIBUTING.md, tests README.md and in run_tests.sh.
Running the tests require to use atoum an alternative or addition to PHPUnit. Explanation why GLPI moved from PHPUnit to atoum can be found in a blog post.
atoum has an extension to produce Sonar coverage reports.