== sanity test 413k: QoS mkdir exclude prefixes ========== 00:09:42 (1788840582)
lmv.lustre-clilmv-ffff8eaf2011c800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8eaf2011c800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8eaf2011c800.qos_exclude_prefixes=_temporary