This output of "ovs-vsctl list bridge br-int" allows you to verify that the integration bridge has been configured appropriately for NVP.

br-int-settings

_uuid               : 5ae0d3ab-49b1-4734-988b-70e04f95124d
controller          : []
datapath_id         : "0000aad3e05a3447"
datapath_type       : ""
external_ids        : {bridge-id=br-int}
fail_mode           : secure
flood_vlans         : []
flow_tables         : {}
mirrors             : []
name                : br-int
netflow             : []
other_config        : {disable-in-band="true"}
ports               : []
protocols           : []
sflow               : []
status              : {}
stp_enable          : false