== sanity test 413k: QoS mkdir exclude prefixes ========== 02:48:54 (1777013334)
lmv.lustre-clilmv-ffff94d303e76000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff94d303e76000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff94d303e76000.qos_exclude_prefixes=_temporary