== sanity test 413k: QoS mkdir exclude prefixes ========== 04:01:13 (1787385673)
lmv.lustre-clilmv-ffff9b378355d800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9b378355d800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9b378355d800.qos_exclude_prefixes=_temporary