traceroute sends 3 packets rapidly that triggers and depends on ICMP error
generation. The current ICMP4 throttle setting at 1-e3 throttles the last
ICMP error and makes traceroute sit in a timeout.
Type: fix
Change-Id: Ie886303600ad0374dcb6ae311e949154727a93d2 Signed-off-by: Ole Troan <otroan@employees.org>