close_all_connections() raise RuntimeError when called in a thread

[doyou89]

In my code, SSHLibrary used like below and this code is run by another thread:

SSHLibrary(...).open_connection(...)
# do something here
SSHLibrary.close_all_connections()

This raise exception:

File "/p4_ws/doyou89.jung/workspace/projects/cosmos/.venv/lib/python3.8/site-packages/SSHLibrary/library.py", line 765, in close_all_connections
    self._connections.close_all()
  File "/p4_ws/doyou89.jung/workspace/projects/cosmos/.venv/lib/python3.8/site-packages/SSHLibrary/sshconnectioncache.py", line 27, in close_all
    connection.close()
  File "/p4_ws/doyou89.jung/workspace/projects/cosmos/.venv/lib/python3.8/site-packages/SSHLibrary/pythonclient.py", line 302, in close
    return super(PythonSSHClient, self).close()
  File "/p4_ws/doyou89.jung/workspace/projects/cosmos/.venv/lib/python3.8/site-packages/SSHLibrary/abstractclient.py", line 160, in close
    logger.log_background_messages()
  File "/p4_ws/doyou89.jung/workspace/projects/cosmos/.venv/lib/python3.8/site-packages/robotbackgroundlogger.py", line 101, in log_background_messages
    raise RuntimeError(
RuntimeError: Logging background messages is only allowed from the main thread. Current thread name: schedule_commands_01

Because close() method in abstractclient.py do not handle RuntimeError, the code of close() is:

def close(self):
        """Closes the connection."""
        self._sftp_client = None
        self._scp_transfer_client = None
        self._scp_all_client = None
        self._shell = None
        self.client.close()
        try:
            logger.log_background_messages()
        except AttributeError:
            pass

I think RuntimeError should be added here.