time: run TestTicker for longer during short test, otherwise it fails
time: run TestTicker for longer during short test, otherwise it fails

R=golang-dev, r
CC=golang-dev
http://codereview.appspot.com/5671049

h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang