1. Create bridges with datapath_type=netdev parameter so that neutron
ovs-agent wouldn't recreate it dropping all the custom settings
2. Delete --no-wait flag to make sure a bridge/port was in fact created
by ovs-vswitchd in order to prevent further commands from failing
Change-Id: I3ad5b63a0813761a23573166c5024e17d87f775d
3bf4954a6b