Add test for handling keep-alived client connection
Add test for handling keep-alived client connection

Server may close socket after sending response, client process it correctly without raising an error

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