Fix travis error for python 3.4
Fix travis error for python 3.4

singulared/aiohttp,rutsky/aiohttp,alex-eri/aiohttp-1,decentfox/aiohttp,decentfox/aiohttp,jettify/aiohttp,arthurdarcet/aiohttp,esaezgil/aiohttp,Eyepea/aiohttp,KeepSafe/aiohttp,moden-py/aiohttp,jettify/aiohttp,juliatem/aiohttp,vaskalas/aiohttp,moden-py/aiohttp,AraHaanOrg/aiohttp,jashandeep-sohi/aiohttp,jashandeep-sohi/aiohttp,panda73111/aiohttp,rutsky/aiohttp,z2v/aiohttp,mind1master/aiohttp,pfreixes/aiohttp,vaskalas/aiohttp,mind1master/aiohttp,hellysmile/aiohttp,panda73111/aiohttp,arthurdarcet/aiohttp,KeepSafe/aiohttp,playpauseandstop/aiohttp,rutsky/aiohttp,pfreixes/aiohttp,arthurdarcet/aiohttp,KeepSafe/aiohttp,mind1master/aiohttp,singulared/aiohttp,decentfox/aiohttp,juliatem/aiohttp,esaezgil/aiohttp,jashandeep-sohi/aiohttp,hellysmile/aiohttp,vaskalas/aiohttp,elastic-coders/aiohttp,singulared/aiohttp,AraHaanOrg/aiohttp,elastic-coders/aiohttp,alex-eri/aiohttp-1,jettify/aiohttp,elastic-coders/aiohttp,z2v/aiohttp,moden-py/aiohttp,panda73111/aiohttp,esaezgil/aiohttp,z2v/aiohttp,alex-eri/aiohttp-1