- improve packet trace logging after each test
- suppress IPv6RA on VPP because it interfered with ipv6 test cases
- do not use fictional destination MAC address, doesn't work in VIRL
- ignore errors when logging configuration - should not fail the test
Change-Id: I16a3321670d4c2fa8f6434dc4badd243b7e4f9fc
Signed-off-by: selias <samelias@cisco.com>