== sanity test 413k: QoS mkdir exclude prefixes ========== 04:02:50 (1790928170)
lmv.lustre-clilmv-ffff9ae6b2a11000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9ae6b2a11000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9ae6b2a11000.qos_exclude_prefixes=_temporary