I can’t really elaborate on the Hybris plugin since this is a 3rd party community plugin not maintained by SonarQube, you may ask questions related to this plugin to the maintained on GitHub.
For what concerns SonarSource deliverables:
do I need to install any jococo plugin in sonarqube? Or is it already part of hybris 1905 ?
You definitely need to install the Jacoco plugin
Wow, still using Ant for your builds !
No matter how you do that, you have to make sure that your run Jacoco after building the code and before running the scanner. I am not familiar enough with Ant to tell you if there’s an Ant task for that, or if you simply have to run Jacoco from the “command line”.
Bottom line, you have first to produce the Jacoco XML report and pass this report path to the scanner in the sonar.coverage.jacoco.xmlReportPaths property