Update to latest parallel test runner
Define test class in context it is accessed

This ensures the tests still work when run using the parallel test
runner.
Use transactional strategy for database cleaner

The parallel test runner performs better with the transaction strategy
Stop quarantine-file scenarios stomping each other

We simulate a mutex to prevent these scenarios stomping over each
other's file data when they are run in parallel
Ensure the parallel databases exist in Jenkins
Create folders for testing uploads
Rake task for running parallel tests
Force database encoding to utf-8 in database.yml
No need for QuarantineFileStorateSimulator here
Merge commit 'ac9c4df1253e6eb3db0a7ce820de2d80ed3738ec' into HEAD