== sanity test 413k: QoS mkdir exclude prefixes ========== 06:19:44 (1787393984)
lmv.lustre-clilmv-ffff892602c2a000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff892602c2a000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff892602c2a000.qos_exclude_prefixes=_temporary