VRRP: Add a test capture file

VRRP: Add a test capture file

This capture file triggered a buffer over-read with the 4.9.2 release
fixed in the 4.9.3 release.

With the new GET_ macros, the problem no longer exists.
Thus no fix needed.

The pcap file was updated to avoid pcap_loop() error messages.

Update the output of the test accordingly.

Partial update from 3de07c772166b7e8e8bb4b9d1d078f1d901b570b
in 4.9 branch.