release.py now also run tests, runtests.py and run_aiotest.py
release.py now also run tests, runtests.py and run_aiotest.py

Modify also release.py to run in dry run, don't upload anything, to avoid mistakes.

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