== sanity test 413k: QoS mkdir exclude prefixes ========== 11:41:18 (1780328478)
lmv.lustre-clilmv-ffff957fc91c3800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff957fc91c3800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff957fc91c3800.qos_exclude_prefixes=_temporary