== sanity test 413k: QoS mkdir exclude prefixes ========== 05:17:42 (1788945462)
lmv.lustre-clilmv-ffff982046f98800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff982046f98800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff982046f98800.qos_exclude_prefixes=_temporary