* INCR-211: run python-modernize and isort to support python2 --> python3 transition
* INCR-211: fix pylint errors.
Removed unused module import request and error.
Used import as to avoid too deep a function call.
Altering imports and using suppression of pylint's import error.
* INCR-211: ignore pylint's import error from six module.
* INCR-211: remove unused modules. Ignore pylint import error from six module.
* INCR-211: ignore pylint's import error from six module. Group imports.
* INCR-211: disable error of 'must be called with literal string'
The specific context for this error means we can disable this.
* INCR-211: change import to satisfy pylint by renaming import
* INCR-211: fix imports so six.unichr works.
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