## What changes were proposed in this pull request?

Currently, if we run `./python/run-tests.py` and they are aborted without cleaning up this directory, it fails pep8 check due to some Python scripts generated. For example, https://github.com/apache/spark/blob/7387126f83dc0489eb1df734bfeba705709b7861/python/pyspark/tests.py#L1955-L1968

```
PEP8 checks failed.
./work/app-20170531190857-0000/0/test.py:5:55: W292 no newline at end of file
./work/app-20170531190909-0000/0/test.py:5:55: W292 no newline at end of file
./work/app-20170531190924-0000/0/test.py:3:1: E302 expected 2 blank lines, found 1
./work/app-20170531190924-0000/0/test.py:7:52: W292 no newline at end of file
./work/app-20170531191016-0000/0/test.py:5:55: W292 no newline at end of file
./work/app-20170531191030-0000/0/test.py:5:55: W292 no newline at end of file
./work/app-20170531191045-0000/0/test.py:3:1: E302 expected 2 blank lines, found 1
./work/app-20170531191045-0000/0/test.py:7:52: W292 no newline at end of file
```

For me, it is sometimes a bit annoying. This PR proposes to exclude these (assuming we want to skip per https://github.com/apache/spark/blob/master/.gitignore#L73).

Also, it moves other pep8 configurations in the script into ini configuration file in pep8.

## How was this patch tested?

Manually tested via `./dev/lint-python`.

Author: hyukjinkwon <gurwls223@gmail.com>

Closes #18161 from HyukjinKwon/work-exclude-pep8.