== sanity test 413k: QoS mkdir exclude prefixes ========== 00:49:25 (1788842965)
lmv.lustre-clilmv-ffff9871b3154800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9871b3154800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9871b3154800.qos_exclude_prefixes=_temporary