== sanity test 413k: QoS mkdir exclude prefixes ========== 07:07:11 (1788520031)
lmv.lustre-clilmv-ffff999fae054000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff999fae054000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff999fae054000.qos_exclude_prefixes=_temporary