There is no usecase in which ovs-db and ovs-vswitchd run on
different nodes.
In terms of version upgrade, ovs-db and ovs-vswitchd should be
upgraded together in every node.
This commit deploys ovs-db and ovs-vswitchd in one daemonset.
Change-Id: I791b9f7abfd3ca838dc2adfaa6c606bb1c88d19d