tests: relax timings for slow buildbots
tests: relax timings for slow buildbots

ajdavis/asyncio,gsb-eng/asyncio,haypo/trollius,gvanrossum/asyncio,Martiusweb/asyncio,vxgmichel/asyncio,vxgmichel/asyncio,gvanrossum/asyncio,gsb-eng/asyncio,jashandeep-sohi/asyncio,fallen/asyncio,1st1/asyncio,gsb-eng/asyncio,gvanrossum/asyncio,1st1/asyncio,jashandeep-sohi/asyncio,ajdavis/asyncio,fallen/asyncio,vxgmichel/asyncio,manipopopo/asyncio,Martiusweb/asyncio,haypo/trollius,1st1/asyncio,manipopopo/asyncio,manipopopo/asyncio,fallen/asyncio,jashandeep-sohi/asyncio,haypo/trollius,ajdavis/asyncio,Martiusweb/asyncio