== sanity test 413k: QoS mkdir exclude prefixes ========== 11:05:03 (1788534303)
lmv.lustre-clilmv-ffff980c3cd77000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff980c3cd77000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff980c3cd77000.qos_exclude_prefixes=_temporary