Add ASK_CONFIRMATION button for backupninja backup job

Change-Id: I8ff319645a9dae9da44a77969dea3b59c8be93ae
Related-Prod: PROD-31827
(cherry picked from commit 8b18dabc4557915d07afec5a02f882d8821dd17e)
diff --git a/jenkins/client/job/deploy/backupninja_backup.yml b/jenkins/client/job/deploy/backupninja_backup.yml
index ab5caf0..9f61701 100644
--- a/jenkins/client/job/deploy/backupninja_backup.yml
+++ b/jenkins/client/job/deploy/backupninja_backup.yml
@@ -23,5 +23,8 @@
             SALT_MASTER_URL:
               type: string
               default: "${_param:jenkins_salt_api_url}"
+            ASK_CONFIRMATION:
+              type: boolean
+              default: 'true'
           triggers:
             - timed: "${_param:backup_min} ${_param:backup_hour} ${_param:backup_day_of_month} ${_param:backup_month} ${_param:backup_day_of_week}"