== sanity test 413k: QoS mkdir exclude prefixes ========== 07:34:01 (1788521641)
lmv.lustre-clilmv-ffff91044a107800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff91044a107800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff91044a107800.qos_exclude_prefixes=_temporary