== sanity test 413k: QoS mkdir exclude prefixes ========== 04:35:42 (1787474142)
lmv.lustre-clilmv-ffff982d1029c800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff982d1029c800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff982d1029c800.qos_exclude_prefixes=_temporary