streamr-1.0 fix-start-and-stop-of-autocertifier-client

[ptesavol]

This is the fix-start-and-stop-of-autocertifier-client pull request moved to base upon streamr-1.0 instead of testnet-one

• make test/end-to-end/RecoveryFromFailedAutoCertification.test.ts to stop the entrypoint last to prevent nodes from starting to reconnect through the stopped entrypoint at the end of the test
• rename WebsocketConnector's autoCertify() method to startAutoCertifierClient() as this is what the method does
• stop AutoCertifierClientFacade in WebsocketConnector if it was started
• start AutoCertifierClient in AutoCertifierClientFacade using an abortable withTimeout() instead of waitForEvent3 (using a async function as waitForEvent3 predicate caused the timeout to keep running in case the predicate threw an exception, which was the reason for test/end-to-end/RecoveryFromFailedAutoCertification.test.ts to hang)
• because of the above changes test/end-to-end/RecoveryFromFailedAutoCertification.test.ts does not hang anymore