== sanity test 413k: QoS mkdir exclude prefixes ========== 12:46:21 (1789145181)
lmv.lustre-clilmv-ffff9e7183936800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9e7183936800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9e7183936800.qos_exclude_prefixes=_temporary