Cleanup pool tests
Cleanup pool tests

- Fix race.
- Fix connection leak.

outrightmental/go-redigo,kpumuk/redigo,stvp/redigo,beni55/redigo,nativetouch/redigo,gomodule/redigo,garyburd/redigo,brodock/redigo,kylebrandt/redigo,lvtiendev/redigo,mbrukman/redigo,linkeo/redigo