== sanity test 413k: QoS mkdir exclude prefixes ========== 22:06:20 (1787105180)
lmv.lustre-clilmv-ffff9f0573f68800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9f0573f68800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9f0573f68800.qos_exclude_prefixes=_temporary