Disable auto trigger for backupninja

* Set backup scheduling to manual in new
backup solution will be this step triggered
by jenkins job.

Related: PROD-28528(PROD:28528)

Change-Id: I9b52b3005b2446511bac6872d68e791ccdbad57b
(cherry picked from commit 89499a558396ee7269e88ffde261018270725c74)
diff --git a/backupninja/client/single.yml b/backupninja/client/single.yml
index 6eecc33..0ea839b 100644
--- a/backupninja/client/single.yml
+++ b/backupninja/client/single.yml
@@ -1,2 +1,8 @@
 classes:
 - service.backupninja.client.single
+parameters:
+  backupninja:
+    client:
+      scheduling:
+        when:
+          - manual