This code changes to allow incremental processing of the
logical flow and physical binding tables whenver possible.
Note: flows created by physical_run for multicast_groups are
*NOT* handled incrementally due to to be solved issues
with GWs and local routers.
Signed-off-by: Ryan Moats <rmoats@us.ibm.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>