== sanity test 413k: QoS mkdir exclude prefixes ========== 03:02:55 (1787468575)
lmv.lustre-clilmv-ffff95969179a800.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff95969179a800.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff95969179a800.qos_exclude_prefixes=_temporary