title: sonarqube causing Out Of Memory on jenkins pipeline
body: <p>when we integrate sonar in jenkins pipeline with
  withSonarQubeEnv('SonarQube') it causes Out Of Memory issue and when we try with
  withSonarQubeEnv(installationName: 'SonarQube', envOnly: true)
  the pipeline completes without any issue.
  how does the envOnly:true solves the issue on jenkins?</p>
  <p>we also tried to integrate sonar in pipeline with
  withSonarQubeEnv('SonarQube') with increased memory on jenkins in that case the pipeline gets completed without any issue.</p>