== sanity test 413k: QoS mkdir exclude prefixes ========== 10:39:39 (1787063979)
lmv.lustre-clilmv-ffff986e4021d000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff986e4021d000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff986e4021d000.qos_exclude_prefixes=_temporary