Invalidate the loop in the client close() call so that it is not closed
twice (which is an error in the asyncio code)
(Bitbake rev: ef22f8ee82c242383625f078baafb629e45dad7e)
Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>