== sanity test 413k: QoS mkdir exclude prefixes ========== 18:08:56 (1790978936)
lmv.lustre-clilmv-ffff9f92c6121000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9f92c6121000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9f92c6121000.qos_exclude_prefixes=_temporary