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 <idosch@nvidia.com>
Link: https://lore.kernel.org/r/20240304095612.462900-5-idosch@nvidia.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

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

@@ -750,7 +750,7 @@ __test_learning()
 	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 $?
@@ -796,11 +796,11 @@ test_learning()
 	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