Give that OpenJDK is the reference platform for new Java/JDK development and the default JDK on Linux
we should support running Nexus with OpenJDK 7.
- We should validate that our product can be built and run with the presently supported (Java8) and latest (Java11) versions of OpenJDK
- update infrastructure to test latest OpenJDK (and discuss support for testing intermediate versions?)
- update documentation to reflect Java support changes