[easier issue if you know python] apply pep8 formatting to all files

We have pep8 speaks set up to check files that are edited in PRs - but we still have some files that aren't checked because they haven't been edited in a while.

Task: Apply pep8 formatting to all files in this repo. You probably want to try a command something like `autopep8 . -r --in-place`.

Note that this command might not fix all long lines - some might need to be done manually.

## if you want to pick up this task

0. Take a look at the [InterMine contributing guidelines](http://intermine.org/contributing/)
1. Comment on this issue stating that you intend to work on the task
2. When you're ready, add your work to the repo and create a pull request.

### What to do if you need help

Mention @yochannah, tweet [@yoyehudi](http://www.twitter.com/yoyehudi), pop by to say hi on [chat](http://chat.intermine.org) or if needed email yo@intermine.org. Don't forget we're usually only available during uk office hours and will not be able to respond at other times :)