== sanity test 413k: QoS mkdir exclude prefixes ========== 19:14:21 (1763338461)
lmv.lustre-clilmv-ffff8ad7edf30800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff8ad7edf30800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff8ad7edf30800.qos_exclude_prefixes=_temporary