[PATCH] tests: Ignore ovs-vswitchd received packet on unknown port. The ovs-vswitchd daemon may in some situations, typically during teardown, log a warning level message 'received packet on unknown port ...'.
[PATCH] tests: Use scapy contrib BFD implementation. Due to a change of behavior in scapy 2.6.x, the current CoPP system test no longer works.
One of the changes we need to do is to switch to using sendp() instead of send(), which requires adding Ethernet frames.
I discovered that scapy 2.6.x includes a BFD contrib module, so while we're already updating the scapy code, let's switch to using the BFD class in the same breath.
To ensure we catch such regresssions in the future, unpin scapy in the CI container image.
