selftests: net: bridge: increase IGMP/MLD exclude timeout membership interval

When running the bridge IGMP/MLD selftests on debug kernels we can get
spurious errors when setting up the IGMP/MLD exclude timeout tests
because the membership interval is just 3 seconds and the setup has 2
seconds of sleep plus various validations, the one second that is left
is not enough. Increase the membership interval from 3 to 5 seconds to
make room for the setup validation and 2 seconds of sleep.

Fixes: 34d7ecb3 ("selftests: net: bridge: update IGMP/MLD membership interval value")
Reported-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -478,10 +478,10 @@ v3exc_timeout_test()
 	RET=0
 	local X=("192.0.2.20" "192.0.2.30")
 
-	# GMI should be 3 seconds
+	# GMI should be 5 seconds
 	ip link set dev br0 type bridge mcast_query_interval 100 \
 					mcast_query_response_interval 100 \
-					mcast_membership_interval 300
+					mcast_membership_interval 500
 
 	v3exclude_prepare $h1 $ALL_MAC $ALL_GROUP
 	ip link set dev br0 type bridge mcast_query_interval 500 \
@@ -489,7 +489,7 @@ v3exc_timeout_test()
 					mcast_membership_interval 1500
 
 	$MZ $h1 -c 1 -b $ALL_MAC -B $ALL_GROUP -t ip "proto=2,p=$MZPKT_ALLOW2" -q
-	sleep 3
+	sleep 5
 	bridge -j -d -s mdb show dev br0 \
 		| jq -e ".[].mdb[] | \
 			 select(.grp == \"$TEST_GROUP\" and \

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

@@ -478,10 +478,10 @@ mldv2exc_timeout_test()
 	RET=0
 	local X=("2001:db8:1::20" "2001:db8:1::30")
 
-	# GMI should be 3 seconds
+	# GMI should be 5 seconds
 	ip link set dev br0 type bridge mcast_query_interval 100 \
 					mcast_query_response_interval 100 \
-					mcast_membership_interval 300
+					mcast_membership_interval 500
 
 	mldv2exclude_prepare $h1
 	ip link set dev br0 type bridge mcast_query_interval 500 \
@@ -489,7 +489,7 @@ mldv2exc_timeout_test()
 					mcast_membership_interval 1500
 
 	$MZ $h1 -c 1 $MZPKT_ALLOW2 -q
-	sleep 3
+	sleep 5
 	bridge -j -d -s mdb show dev br0 \
 		| jq -e ".[].mdb[] | \
 			 select(.grp == \"$TEST_GROUP\" and \