== sanity test 413k: QoS mkdir exclude prefixes ========== 21:29:50 (1777426190)
lmv.lustre-clilmv-ffff9520ce1d2800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9520ce1d2800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9520ce1d2800.qos_exclude_prefixes=_temporary