I don't really understand why JUnit would be relevant here, but we're
getting this failure after everything else seems to pass.
[xUnit] [INFO] - Processing JUnit
[xUnit] [INFO] - [JUnit] - No test report file(s) were found with the pattern 'Ninja-ReleaseAssert/swift-linux-x86_64/swift-test-results/x86_64-unknown-linux-gnu/lit-tests.xml' relative to '/home/buildnode/jenkins/workspace/oss-swift-incremental-RA-linux-ubuntu-14_04-long-test' for the testing framework 'JUnit'. Did you enter a pattern relative to the correct directory? Did you generate the result report(s) for 'JUnit'?
[xUnit] [ERROR] - No test reports found for the metric 'JUnit' with the resolved pattern 'Ninja-ReleaseAssert/swift-linux-x86_64/swift-test-results/x86_64-unknown-linux-gnu/lit-tests.xml'. Configuration error?.
[xUnit] [INFO] - Failing BUILD.