bash evaluation as opposed to gha.

Author: DaanHoogland

.github/workflows/sonar-check.yml

@@ -65,7 +65,8 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
           PR_ID: ${{ github.event.pull_request.number }}
+          HEADREF: ${{ github.event.pull_request.head.ref }}
         run: |
           git clone https://github.com/shapeblue/cloudstack-nonoss.git nonoss
           cd nonoss && bash -x install-non-oss.sh && cd ..
-          mvn -P quality -Dsimulator -Dnoredist clean install org.sonarsource.scanner.maven:sonar-maven-plugin:sonar -Dsonar.projectKey=apache_cloudstack -Dsonar.pullrequest.key=$PR_ID -Dsonar.pullrequest.branch=${{ github.event.pull_request.head.ref }} -Dsonar.pullrequest.github.repository=apache/cloudstack -Dsonar.pullrequest.provider=GitHub -Dsonar.pullrequest.github.summary_comment=true
+          mvn -P quality -Dsimulator -Dnoredist clean install org.sonarsource.scanner.maven:sonar-maven-plugin:sonar -Dsonar.projectKey=apache_cloudstack -Dsonar.pullrequest.key=$PR_ID -Dsonar.pullrequest.branch=$HEADREF -Dsonar.pullrequest.github.repository=apache/cloudstack -Dsonar.pullrequest.provider=GitHub -Dsonar.pullrequest.github.summary_comment=true