[WIP] COV: Ignore tests in calculating coverage

[effigies]

This is an attempt to get more accurate coverage reports. Follow-up to #2386, which re-enabled codecov uploads. Will update the following list to reflect steps taken.

1. Removing tests directories, to reduce noise in report

[effigies]

Looks like we're still not updating codecov properly for pull requests. https://codecov.io/gh/nipy/nipype/pulls

[satra]

@effigies - i added the codecov token to circle environment variables. let's see if that helps. do you mind retriggering this PR?

[effigies]

Doesn't seem to have.

[satra]

we should also add examples to this list. we don't need to see which lines in examples are covered.

[satra]

@effigies - i'll check the logs more closely in the codecov lines.

[satra]

it looks like it did upload - also it says token not required for public repos uploading from circle ci

[effigies]

Yeah, they're uploading, but not getting associated with the pull requests. #2446 is, though, presumably because it's saying nipy/nipype, not effigies/nipype. I'll try modifying the slug.

[effigies]

Nope, that causes a validation error.

[effigies]

@satra If you're more familiar with codecov, feel free to push to this branch. I've taken a few stabs at figuring this out, and unless it's something that fixes itself on new PRs after a few bumps to master, I'm completely stumped. I've checked the logs for the individual pushes, and there's no clear error.

[satra]

i can't see a clear picture here. i have gone through the logs as well. some of them are generating a Github 404 error in trying to get info about a commit. let me merge this in so that master coverage is cleaned up. and i will open a separate issue to track the PR issue.