Add tests for iojs-v2
Add tests for iojs-v2

phlip9/ioredis,xuyanxiang/ioredis,fracmak/ioredis,mtlima/ioredis,luin/ioredis,AVVS/ioredis,DynamicYield/ioredis,suprememoocow/ioredis,pensierinmusica/ioredis,dguo/ioredis,alsotang/ioredis,luin/ioredis,thorsteinsson/ioredis,lonely8rain/ioredis,luin/ioredis,DynamicYield/ioredis,nswbmw/ioredis,ColmHally/ioredis,AlphaStaxLLC/ioredis,paskakaska/ioredis,albin3/ioredis