'run specified command in a running OCI container using buildah'

@ensure_connect
def exec_command(self, cmd, in_data=None, sudoable=False):

    super(Connection, self).exec_command(cmd, in_data=in_data, sudoable=sudoable)
    cmd_bytes = to_bytes(cmd, errors='surrogate_or_strict')
    cmd_args_list = shlex.split(cmd_bytes)
    (rc, stdout, stderr) = self._buildah('run', cmd_args_list)
    display.vvvvv(('STDOUT    %r    STDERR    %r' % (stderr, stderr)))
    return (rc, stdout, stderr)
