travisci-build-master-45: Re-enabling parallel test runs now that the migration issue is fixed

https://travis-ci.org/journeymonitor/analyze/builds/102037399

travisci-build-master-44

https://travis-ci.org/journeymonitor/analyze/builds/101901464

travisci-build-master-43

https://travis-ci.org/journeymonitor/analyze/builds/101900828

travisci-build-master-41

https://travis-ci.org/journeymonitor/analyze/builds/101894870

travisci-build-master-40

https://travis-ci.org/journeymonitor/analyze/builds/101665956

travisci-build-master-39

https://travis-ci.org/journeymonitor/analyze/builds/101534512

travisci-build-master-38

https://travis-ci.org/journeymonitor/analyze/builds/101527180

travisci-build-master-31: Disabling parallel tests fixes #11 (but isn't really satisfying)

https://travis-ci.org/journeymonitor/analyze/builds/99498371

travisci-build-master-28

https://travis-ci.org/journeymonitor/analyze/builds/99447987

travisci-build-master-27

https://travis-ci.org/journeymonitor/analyze/builds/96610076