Tox and run_tests.sh were running PEP8 checks against different
file-sets. This patch refactors the logic to determine which files to
run PEP8 checks on into `tools/run_pep8.sh` where it can be called by
both tox and `run_tests.sh`.
Additional fixes:
Some of our Python XenAPI Dom0 plugins don't end in *.py but should
still be checked by PEP8. This patches fixes the hacking.py violations
in the files and adds them back to the srcfiles list.
Merged tools/unused_imports.sh into tools/run_pep8.sh
Change-Id: Id5edd1acb644ab938beffc3473494a179d9d8cda
0a93b563e9