Add in empty list defaults for new ghprb values

playbooks/roles/jenkins_common/defaults/main.yml

@@ -109,6 +109,8 @@ jenkins_common_ghprb_results:
 JENKINS_GHPRB_ADMIN_LIST: []
 JENKINS_GHPRB_CREDENTIAL_ID: ''
 JENKINS_GHPRB_SHARED_SECRET: ''
+JENKINS_GHPRB_BLACK_LIST: []
+JENKINS_MAIN_GITHUB_OWNER_WHITELIST: []
 
 # credentials
 JENKINS_SECRET_FILES_LIST: []