Upgrade to JUnit 4.12
Upgrade to JUnit 4.12

Release notes:

https://github.com/junit-team/junit/blob/master/doc/ReleaseNotes4.12.md

bouncestorage/s3proxy,timuralp/s3proxy,kahing/s3proxy,flandr/s3proxy,bouncestorage/s3proxy,timuralp/s3proxy,andrewgaul/s3proxy,kahing/s3proxy,andrewgaul/s3proxy,flandr/s3proxy