== sanity test 413k: QoS mkdir exclude prefixes ========== 20:16:15 (1789690575)
lmv.lustre-clilmv-ffff9f1182b40000.qos_exclude_prefixes=+abc:123:foo bar
lmv.lustre-clilmv-ffff9f1182b40000.qos_exclude_prefixes=-abc:123:foo bar
lmv.lustre-clilmv-ffff9f1182b40000.qos_exclude_prefixes=_temporary