== sanity test 413k: QoS mkdir exclude prefixes ========== 00:20:10 (1764739210)
lmv.lustre-clilmv-ffff99c2c4d33800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff99c2c4d33800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff99c2c4d33800.qos_exclude_prefixes=_temporary