== sanity test 413k: QoS mkdir exclude prefixes ========== 02:14:49 (1744092889)
lmv.lustre-clilmv-ffff880095c44800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff880095c44800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff880095c44800.qos_exclude_prefixes=_temporary