Changes an attribute of this instance

        :type attribute: string
        :param attribute: The attribute you wish to change.
                          AttributeName - Expected value (default)
                          instanceType - A valid instance type (m1.small)
                          kernel - Kernel ID (None)
                          ramdisk - Ramdisk ID (None)
                          userData - Base64 encoded String (None)
                          disableApiTermination - Boolean (true)
                          instanceInitiatedShutdownBehavior - stop|terminate
                          rootDeviceName - device name (None)

        :type value: string
        :param value: The new value for the attribute

        :rtype: bool
        :return: Whether the operation succeeded or not

def modify_attribute(self, attribute, value):
        """
        Changes an attribute of this instance

        :type attribute: string
        :param attribute: The attribute you wish to change.
                          AttributeName - Expected value (default)
                          instanceType - A valid instance type (m1.small)
                          kernel - Kernel ID (None)
                          ramdisk - Ramdisk ID (None)
                          userData - Base64 encoded String (None)
                          disableApiTermination - Boolean (true)
                          instanceInitiatedShutdownBehavior - stop|terminate
                          rootDeviceName - device name (None)

        :type value: string
        :param value: The new value for the attribute

        :rtype: bool
        :return: Whether the operation succeeded or not
        """
        return self.connection.modify_instance_attribute(self.id, attribute,
                                                         value)