system-traffic.at: Avoid sporadic failures during conntrack IPv6 HTTP/FTP tests.

Some sporadic false positive may be visible for the following tests:

- conntrack - IPv6 HTTP
- conntrack - FTP over IPv6

The failures show up randomly.
The reason appears to be source address used when performing the
request using wget:
-tcp,orig=(src=fc00::1,dst=fc00::2,sport=<cleared>,dport=<cleared>),\
    reply=(src=fc00::2,dst=fc00::1,sport=<cleared>,dport=<cleared>),\
    protoinfo=(state=<cleared>)
+tcp,orig=(src=fe80::f0eb:f8ff:fef0:138f,dst=fc00::2,sport=<cleared>,dport=<cleared>),\
    reply=(src=fc00::2,dst=fe80::f0eb:f8ff:fef0:138f,sport=<cleared>,dport=<cleared>),\
    protoinfo=(state=<cleared>)

It seems that the problem can be addressed in multiple ways, but using
"nodad" seems to be safe enough to fix the issue that now, after
hundreds of attempts, is no longer present.

Signed-off-by: Paolo Valerio <pvalerio@redhat.com>
Acked-by: Mike Pattrick <mkp@redhat.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>

0 files changed, 0 insertions, 0 deletions