Fix bug where connection to remote host via SSH is not possible if they host's public key has been changed

[manoss96]

In case there has been previously a connection to a remote host, during which the host's public key was added to known hosts, connecting to the same host is impossible if their public key has been changed, even if one set's verify_host to False. This bug should be fixed so that one is able to connect to a remote host without verification, even if a different public key is stored on their device.