== sanity test 413k: QoS mkdir exclude prefixes ========== 18:56:31 (1789080991)
lmv.lustre-clilmv-ffff903cc3686000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff903cc3686000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff903cc3686000.qos_exclude_prefixes=_temporary