== sanity test 413k: QoS mkdir exclude prefixes ========== 14:31:19 (1780338679)
lmv.lustre-clilmv-ffff9c7ef1223000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9c7ef1223000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9c7ef1223000.qos_exclude_prefixes=_temporary