now can safely remove allow_failure option from gitlab ci yml file

.gitlab-ci.yml

@@ -38,7 +38,6 @@ SonarScanner:
     name: sonarsource/sonar-scanner-cli:latest
     entrypoint: [""]
   stage: sonarqube
-  allow_failure: true
   script:
     - sonar-scanner
       -Dsonar.host.url=https://pmpl.cs.ui.ac.id/sonarqube-advprog