automation: Disable ipv6 in the container

Until IPv6 is properly supported, disable the IPv6 stack
on eth1 and eth2 container interfaces.

Signed-off-by: Edward Haas <edwardh@redhat.com>

automation/run-integration-tests.sh

@@ -34,7 +34,9 @@ function add_extra_networks {
     docker network connect $NET1 $CONTAINER_ID
     docker_exec '
       ip addr flush eth1 && \
-      ip addr flush eth2
+      ip addr flush eth2 && \
+      echo 1 > /proc/sys/net/ipv6/conf/eth1/disable_ipv6 || true \
+      echo 1 > /proc/sys/net/ipv6/conf/eth2/disable_ipv6 || true
     '
 }