packets: Reorder CS_* flags to remove gap.

packets: Reorder CS_* flags to remove gap.

This changes the conntrack state flags used in the OpenFlow interface
to match the ones we currently use in the datapath.  While these do
not need to be synced, it is nice to get rid of the gap.

This should be merged before the first OVS release with connection
tracking, or not at all.

Signed-off-by: Jarno Rajahalme <jarno@ovn.org>
Acked-by: Ben Pfaff <blp@ovn.org>