Adds the specified trunk group to the interface

        Args:
            intf (str): The interface name to apply the trunk group to
            value (str): The trunk group value to apply to the interface

        Returns:
            True if the operation as successfully applied otherwise false

def add_trunk_group(self, intf, value):
        """Adds the specified trunk group to the interface

        Args:
            intf (str): The interface name to apply the trunk group to
            value (str): The trunk group value to apply to the interface

        Returns:
            True if the operation as successfully applied otherwise false
        """
        string = 'switchport trunk group {}'.format(value)
        return self.configure_interface(intf, string)