Test suite sometimes fails randomly when run on Jenkins

[krame505]

For example, I'm not sure why most of the tests failed for this build: http://coldpress.cs.umn.edu:8080/job/melt-umn/job/ableC/job/fix%252FcppTags/2/ I haven't been able to reproduce it at all reliably, but this seems to happen when multiple ableC builds are happening at the same time.