Check Order values used in python generators

[lizlooney]

I noticed that in mrc_component.ts, it calls generator.valueToCode(block, 'ARG' + i, Order.NONE); for each argument.
It should use Order.NONE if there is one argument and Order.COMMA if there is more than argument.

The python generators for other blocks should be checked too.

[lizlooney]

It should use Order.NONE if there is one argument and Order.COMMA if there is more than argument.

Actually, looking at the python generator for Blockly's math_random_int block, it uses Order.NONE for the arguments that are separated by a comma.

[lizlooney]

The only one I found that needs to be changed is in mrc_port.ts. Order.ATOMIC should be changed to Order.FUNCTION_CALL.