Test coverage not imported into SonarCloud

[henrythasler]

Mitigation actions:

• Set up your coverage tool to run as part of your build pipeline. Your coverage tool should be set up to run before the SonarScanner analysis.
• Adapt travis config accordingly
• maybe use some commandline-options for sonar-scanner to point it to the coverage location

see:

• https://docs.sonarqube.org/latest/analysis/coverage/
• https://docs.travis-ci.com/user/build-stages/

[henrythasler]

The config parameter was changed accordingly...