This PS let daisy to get max_parallel_os_upgrade_number & max_parallel_os_number only from config file instead of get them inside code. This PS also delete unused glance config options. Change-Id: Iedba3c1ab424632771fac09ae430eadd516282c7 Signed-off-by: Zhijiang Hu <hu.zhijiang@zte.com.cn>