Add tests for ProxyConnector.proxy_auth property
Add tests for ProxyConnector.proxy_auth property

jojurajan/aiohttp,AraHaanOrg/aiohttp,danielnelson/aiohttp,noodle-learns-programming/aiohttp,pathcl/aiohttp,vaskalas/aiohttp,jashandeep-sohi/aiohttp,singulared/aiohttp,vaskalas/aiohttp,AlexLisovoy/aiohttp,pfreixes/aiohttp,elastic-coders/aiohttp,Insoleet/aiohttp,panda73111/aiohttp,decentfox/aiohttp,panda73111/aiohttp,moden-py/aiohttp,alexsdutton/aiohttp,alunduil/aiohttp,iksteen/aiohttp,arthurdarcet/aiohttp,jashandeep-sohi/aiohttp,singulared/aiohttp,moden-py/aiohttp,singulared/aiohttp,arthurdarcet/aiohttp,juliatem/aiohttp,Eyepea/aiohttp,KeepSafe/aiohttp,mind1master/aiohttp,alex-eri/aiohttp-1,moden-py/aiohttp,esaezgil/aiohttp,elastic-coders/aiohttp,AraHaanOrg/aiohttp,alex-eri/aiohttp-1,decentfox/aiohttp,z2v/aiohttp,jojurajan/aiohttp,sterwill/aiohttp,alex-eri/aiohttp-1,z2v/aiohttp,vaskalas/aiohttp,Srogozins/aiohttp,jettify/aiohttp,KeepSafe/aiohttp,mind1master/aiohttp,hellysmile/aiohttp,esaezgil/aiohttp,andyaguiar/aiohttp,AlexLisovoy/aiohttp,avanov/aiohttp,vasylbo/aiohttp,z2v/aiohttp,panda73111/aiohttp,rutsky/aiohttp,KeepSafe/aiohttp,hellysmile/aiohttp,pfreixes/aiohttp,rutsky/aiohttp,rutsky/aiohttp,jashandeep-sohi/aiohttp,vedun/aiohttp,jettify/aiohttp,flying-sheep/aiohttp,alexsdutton/aiohttp,playpauseandstop/aiohttp,iksteen/aiohttp,esaezgil/aiohttp,morgan-del/aiohttp,arthurdarcet/aiohttp,elastic-coders/aiohttp,mind1master/aiohttp,jettify/aiohttp,decentfox/aiohttp,juliatem/aiohttp