Don't install authorized_keys if user missing
If the `remote_execution_ssh_user` doesn't exist, then skip trying toinstall the `remote_execution_ssh_keys` as `authorized_keys`.
This prevents erroneously creating `/~some_user/.ssh/authorized_keys`.
Also updated misleading comments.
GH-314
Don't install authorized_keys if user missing
If the `remote_execution_ssh_user` doesn't exist, then skip trying to
install the `remote_execution_ssh_keys` as `authorized_keys`.
This prevents erroneously creating `/~some_user/.ssh/authorized_keys`.
Also updated misleading comments.
GH-314