[DBBackupRotation] Don't print cron several times [skip ci]

pica-db-backup-rotation/start_rotation.py

@@ -48,7 +48,7 @@ try:
                 print("Warning : Folder {0} does not exist, skipping...".format(services_list[service]["Folder"]))
         print("\nConfiguration done. Cron jobs enabled : ")
         for job in cron:
-            print("\t{0}".format(cron))
+            print("\t{0}".format(job))
 except:
     sys.stderr.write('Err: while opening JSON config file.\n')