test-ndisc-rs: increase timeouts

Timestamp: Mon 2020-07-27 13:50:50 UTC
Monotonic: 985702942708
Hop limit: 64
Flags: <|MANAGED>
Preference: medium
Lifetime: 180
No MTU set
>> Option 3
Valid Lifetime: 500
Preferred Lifetime: 440
Flags: <ONLINK|AUTO>
Prefix Length: 64
Prefix: 2001:db8:dead:beef::
>> Option 25
DNS: 2001:db8:dead:beef::1
Lifetime: 60
>> Option 31
Domain: lab.intra
Lifetime: 60
>> Option 1
Address: 782bcbb36d53
NDISC: Started IPv6 Router Solicitation client
backoff timeout interval  1 3.600s <= 3.987s <= 4.400s
NDISC: Sent Router Solicitation, next solicitation in 3s
backoff timeout interval  2 7.576s <= 8.114s <= 8.374s
NDISC: Sent Router Solicitation, next solicitation in 8s
Assertion 'false' failed at src/libsystemd-network/test-ndisc-rs.c:172, function test_rs_hangcheck(). Aborting.