fix some ghprb settings

playbooks/roles/jenkins_build/templates/ghprb_config.yml.j2

@@ -14,9 +14,9 @@ CRON_SCHEDULE: 'H/5 * * * *'
 USE_COMMENTS: false
 USE_DETAILED_COMMENTS: false
 MANAGE_WEBHOOKS: false
-UNSTABLE_AS: 'pending'
+UNSTABLE_AS: 'failure'
 AUTO_CLOSE_FAILED_PRS: false
-DISPLAY_ERRORS_DOWNSTREAM: true
+DISPLAY_ERRORS_DOWNSTREAM: false
 BLACK_LIST_LABELS:
 {% for blacklist in JENKINS_GHPRB_BLACK_LIST %}
     - '{{ blacklist }}'
@@ -28,7 +28,7 @@ WHITE_LIST_LABELS:
 GITHUB_AUTH: ''
 SIMPLE_STATUS: ''
 PUBLISH_JENKINS_URL: ''
-BUILD_LOG_LINES_TO_DISPLAY: ''
+BUILD_LOG_LINES_TO_DISPLAY:
 RESULT_MESSAGES:
     - STATUS: 'FAILURE'
       MESSAGE: 'Test FAILed.'