ERROR [0.000s]: tearDownClass (eSDK.oeSDKExtSelfTest)
FileNotFoundError: [Errno 2] No such file or directory: 'bitbake.sock'
which is due to bitbake taking a small amount of time to shut down the server.
The easiest fix is just to ignore these kinds of errors, bitbake shouldn't create
any new files during shutdown.
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>