Shane et al - could we get a test job in Jenkins to test the Scala 2.12 build? I don't think I have the access or expertise for it, though I could probably copy and paste a job. I think we just need to clone the, say, master Maven Hadoop 2.7 job, and add two steps: run "./dev/change-scala-version.sh 2.12" first, then add "-Pscala-2.12" to the profiles that are enabled.
I can already see two test failures for the 2.12 build right now and will try to fix those, but this should help verify whether the failures are 'real' and detect them going forward.
