== sanity test 413k: QoS mkdir exclude prefixes ========== 01:10:02 (1789189802)
lmv.lustre-clilmv-ffff8889cf8bf800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8889cf8bf800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8889cf8bf800.qos_exclude_prefixes=_temporary