'Run a command on the node as root.
:param args: Command and arguments to run.
:param handle_stdout: Callable that will be called with lines parsed
from the command stdout. By default logs an Eliot message.
:param handle_stderr: Callable that will be called with lines parsed
from the command stderr. By default logs an Eliot message.
:return Deferred: Deferred that fires when the process is ended.'

def run_as_root(self, args, handle_stdout=None, handle_stderr=None):

    return run_ssh(reactor, 'root', self.public_address, args, handle_stdout=handle_stdout, handle_stderr=handle_stderr)
