wocky-test-helper: increase timeout to 3 seconds
wocky-test-helper: increase timeout to 3 seconds

2 seconds isn't enough when valgriding some complex tests.

noonien-d/wocky,freedesktop-unofficial-mirror/wocky,noonien-d/wocky,freedesktop-unofficial-mirror/wocky,freedesktop-unofficial-mirror/wocky,noonien-d/wocky