codeclimate: add basic codeclimate configuration
codeclimate: add basic codeclimate configuration

This configuration will exclude the test directories which tend
to create false-negatives with regards to duplication (such are tests).

https://codeclimate.com/github/digidotcom/python-wpa-supplicant

digidotcom/python-wpa-supplicant,digidotcom/python-wpa-supplicant,wangxhere/python-wpa-supplicant,wangxhere/python-wpa-supplicant