answered 2017-05-03 22:18:43 +0200
Per abalutoiu's comment on my question, changing rpc_backend=neutron.openstack.common.rpc.impl_kombu to rpc_backend=rabbit in the neutron_ovs_agent.conf did the trick! The neutron-ovs-agent service is starting now.
rpc_backend=neutron.openstack.common.rpc.impl_kombu
rpc_backend=rabbit
neutron_ovs_agent.conf