Run tests against all recent Java versions and migrate tests to junit5.#108

Merged

ar merged 2 commits intojpos:masterfrom jameshilliard:java-update

Jul 15, 2019

+329-305

Commits on Jul 14, 2019

Run tests against all recent Java versions.
jameshilliard
committed

Commits on Jul 15, 2019

Migrate tests to junit5.
jameshilliard
committed