== sanity test 413k: QoS mkdir exclude prefixes ========== 05:54:51 (1780998891)
lmv.lustre-clilmv-ffff8cb9888f7800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8cb9888f7800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8cb9888f7800.qos_exclude_prefixes=_temporary