Fix gaiohttp tests for Python 2.5
Fix gaiohttp tests for Python 2.5

mvaled/gunicorn,malept/gunicorn,1stvamp/gunicorn,gtrdotmcs/gunicorn,wong2/gunicorn,GitHublong/gunicorn,beni55/gunicorn,elelianghh/gunicorn,ccl0326/gunicorn,tempbottle/gunicorn,ccl0326/gunicorn,zhoucen/gunicorn,1stvamp/gunicorn,wong2/gunicorn,MrKiven/gunicorn,prezi/gunicorn,malept/gunicorn,gtrdotmcs/gunicorn,ephes/gunicorn,wong2/gunicorn,prezi/gunicorn,zhoucen/gunicorn,tejasmanohar/gunicorn,mvaled/gunicorn,WSDC-NITWarangal/gunicorn,z-fork/gunicorn,malept/gunicorn,harrisonfeng/gunicorn,prezi/gunicorn,ccl0326/gunicorn,jamesblunt/gunicorn,gtrdotmcs/gunicorn,mvaled/gunicorn,keakon/gunicorn,jamesblunt/gunicorn,jamesblunt/gunicorn,zhoucen/gunicorn,1stvamp/gunicorn