Add a way to check for quality profiles

[elboletaire]

Nor the sonar scanner, nor the gitlab plugin for sonar, support crashing the scan in case a quality profile fails, but we can use the sonar api to fix that.

See https://docs.sonarqube.org/display/SONARQUBE54/Breaking+the+CI+Build for more details about how to break the build, but basically we should:

• [ ] Only do this if a variable like QUALITY_CHECK is defined.
• [ ] Take ceTaskId from the generated file by sonar report-task.txt.
• [ ] GET call to ${SONAR_URL}/api/ce/task?id=${ceTaskId} and get analysisId field
• [ ] GET call to ${SONAR_URL}api/qualitygates/project_status?analysisId=${analysisId} and get analysisId field
• [ ] In case the response from the previous call returns status !== OK, break the build.

[elboletaire]

Apparently, quality gates are currently crashing our builds in sonarqube > 7.0, so this is not needed anymore.