Yicheng Qin 3b8349c06e pkg/wait: extend wait timeout in TestWaitTime
Fix this error happening on travis:
```
--- FAIL: TestWaitTime-2 (0.01s)
		wait_time_test.go:46: cannot receive from ch as expected
```
2015-11-04 11:18:17 -08:00
..
2015-09-15 14:09:01 -07:00