tests: Fix ResourceWarnings related to unclosed transports
tests: Fix ResourceWarnings related to unclosed transports

Martiusweb/asyncio,Martiusweb/asyncio,vxgmichel/asyncio,vxgmichel/asyncio,ajdavis/asyncio,Martiusweb/asyncio,ajdavis/asyncio,vxgmichel/asyncio,ajdavis/asyncio