Stop the mitmproxy

def stop_proxy(self):
        """Stop the mitmproxy
        """

        self.runner.info_log("Stopping proxy...")

        files = [
            (self.remote_proxy_output_path, self.local_proxy_output_path),
            (self.remote_proxy_log_path, self.local_proxy_log_path)
        ]
        for remote_file_path, local_file_path in files:
            self.scp_file_remote_to_local(remote_file_path, local_file_path)

        # kill the proxy
        self.execute_command("fuser -k %s/tcp" % str(self.proxy_port))