edx/edx-platform — pull request #114 by wedaly (2013-06-10 15:08:42+00:00)
Title: Clean tests step now removes stale coverage report files.

Currently, you have to run `rake clobber` before running `rake test` to avoid using stale data to generate coverage reports.

This PR cleans the reports folders before tests run to ensure that coverage report data always matches the state of the last test run.

Suggested reviewers: @jzoldak @rocha