== sanity test 413k: QoS mkdir exclude prefixes ========== 09:58:09 (1785419889)
lmv.lustre-clilmv-ffff8938af01f000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8938af01f000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8938af01f000.qos_exclude_prefixes=_temporary