SLING-8358 - Build should not fail if a project is not onboarded to SonarCloud

Debug information
diff --git a/vars/slingOsgiBundleBuild.groovy b/vars/slingOsgiBundleBuild.groovy
index 2ed02c8..cd7f6fb 100644
--- a/vars/slingOsgiBundleBuild.groovy
+++ b/vars/slingOsgiBundleBuild.groovy
@@ -51,9 +51,10 @@
                                 try {
                                     sh "mvn -U clean verify sonar:sonar ${sonarcloudParams}"
                                 } catch ( Exception e ) {
+                                    echo "Message is ${e.message}"
                                     if ( e.getMessage().contains("not authorized to run analysis")) {
                                         echo "Marking build unstable due to missing SonarCloud onboarding. See https://cwiki.apache.org/confluence/display/SLING/SonarCloud+analysis for steps to fix."
-                                        currentBuild.result = "UNSTABLE"
+                                        currentBuild.result = 'UNSTABLE'
                                     }
                                 }
                         }