== sanity test 413k: QoS mkdir exclude prefixes ========== 22:31:05 (1786069865)
lmv.lustre-clilmv-ffff9d2d91c78800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9d2d91c78800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9d2d91c78800.qos_exclude_prefixes=_temporary