Replace args and config methods with CONFIG property

[johnandersen777]

Get ride of args(...) and config(...) methods

Auto args and config was implemented here: 22c0303

Now we have to use it everywhere.

I suggest changing one class then re-running the tests to confirm nothing broke.

[johnandersen777]

Done with

• dffml/source/*
• model/tensorflow
• model/scratch
• model/scikit

[johnandersen777]

What's left:

• dffml/df/memory.py
• source/mysql
  • NOTE Pretty sure _ is not supported yet by the auto args and config. If it is, great, it should take - and make it into _, but it likely will not work. If you have time to fix it great. If not, just figure out one-word versions of the same properties and update the docs.