title: Is it possible to set up the Main Branch name automatically?
body: <p>I use sonar-runner (2.8) to launch analysis in Jenkins job.
  The Sonar Branch plugin is installed on SonarQube 6.7.1 server that I use.</p>
  
  <p>Regardless of what values I put in params:</p>
  
  <p>sonar.projectKey</p>
  
  <p>sonar.projectName</p>
  
  <p>sonar.branch.name   #from branch plugin</p>
  
  <p>sonar.branch.target  #from branch plugin</p>
  
  <p>I cannot set up the Main branch name. It's always called the "master" which is the default name for Main branch. I also played with the regex responsible for detecting long-live branches.</p>
  
  <p>I can change the branch name of the Main branch by hand on the SonarQube server side (via UI). I'd like to set it up on the parameters side (before the analysis is launched) to avoid manual work.</p>
  
  <p>Is it possible at all?</p>