selftests: forwarding: Make vxlan-bridge-1q pass on debug kernels

The ageing time used by the test is too short for debug kernels and
results in entries being aged out prematurely [1].

Fix by increasing the ageing time.

[1]
# ./vxlan_bridge_1q.sh
[...]
INFO: learning vlan 10
TEST: VXLAN: flood before learning [ OK ]
TEST: VXLAN: show learned FDB entry [ OK ]
TEST: VXLAN: learned FDB entry [FAIL]
swp4: Expected to capture 0 packets, got 10.
RTNETLINK answers: No such file or directory
TEST: VXLAN: deletion of learned FDB entry [ OK ]
TEST: VXLAN: Ageing of learned FDB entry [FAIL]
swp4: Expected to capture 0 packets, got 10.
TEST: VXLAN: learning toggling on bridge port [ OK ]
[...]

Signed-off-by: Ido Schimmel <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

tools/testing/selftests/net/forwarding/vxlan_bridge_1q.sh

···
 	expects[0]=0; expects[$idx1]=10; expects[$idx2]=0
 	vxlan_flood_test $mac $dst $vid "${expects[@]}"
 
-	sleep 20
+	sleep 60
 
 	bridge fdb show brport $vx | grep $mac | grep -q self
 	check_fail $?
···
 	local dst=192.0.2.100
 	local vid=10
 
-	# Enable learning on the VxLAN devices and set ageing time to 10 seconds
-	ip link set dev br1 type bridge ageing_time 1000
-	ip link set dev vx10 type vxlan ageing 10
+	# Enable learning on the VxLAN devices and set ageing time to 30 seconds
+	ip link set dev br1 type bridge ageing_time 3000
+	ip link set dev vx10 type vxlan ageing 30
 	ip link set dev vx10 type vxlan learning
-	ip link set dev vx20 type vxlan ageing 10
+	ip link set dev vx20 type vxlan ageing 30
 	ip link set dev vx20 type vxlan learning
 	reapply_config