== sanity test 413k: QoS mkdir exclude prefixes ========== 15:07:40 (1767038860)
lmv.lustre-clilmv-ffff9c3652254800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9c3652254800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9c3652254800.qos_exclude_prefixes=_temporary