== sanity test 413k: QoS mkdir exclude prefixes ========== 23:56:03 (1780458963)
lmv.lustre-clilmv-ffff89f4464be800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff89f4464be800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff89f4464be800.qos_exclude_prefixes=_temporary