Openflowplugin manager doesn't use match extensions while comparing two flows

Because of that, the hashing statistics manager relies upon to make unique keys
is not able to distinguish between multiple rules that differ based on the match
extension – such as REG0. That is also compound by the fact that actions are not part of the hashing as well.

That causes bugs when we have rules like this:

cookie=0x0, duration=255.353s, table=110, n_packets=8, n_bytes=648, priority=16384,reg0=0x1,tun_id=0x1,dl_dst=01:00:00:00:00:00/01:00:00:00:00:00 actions=output:1,output:2
cookie=0x0, duration=256.115s, table=110, n_packets=9, n_bytes=1464, priority=16384,reg0=0x2,tun_id=0x1,dl_dst=01:00:00:00:00:00/01:00:00:00:00:00 actions=output:1

So statistics manager assign the same id internally to both the flows and that's causing the repeated error message about duplicate id.

Adding match extension in flow comparison is not trivial and we cannot implement it in this release.

Anil added a simple solution, where flow comparison now use
cookies as a one of the element for flow comparison, so application can use that do differentiate the flows.

Following openflowplugin patch has more details:
https://git.opendaylight.org/gerrit/#/c/18442/

This patch adds cookie value to the flows net-virt installs. Cookies value is associated with individual flow for it's life time.