Clean up parameter names with `[i]` in them

[ukBaz]

One last question, how do you access the controller_index array?

To get values from such parameters it is necessary to do:

>>> data.cmd_response_frame.__getattribute__('controller_index[i]')
[0]

Which is clearly not practical (or intended). This looks to be introduced because of the automatic generation of the structure from the API documentation which has the parameter name Controller_Index[i]

There are a few others with a similar looking issue and need the [i] removed

Originally posted by @ukBaz in #8 (comment)