Prefixing names in the java package with "java" is redundant, inside
the java package it is clear that they refer to something java
related, and outside the package they will be referred to with a
java. prefix.
Test: java_test.go
Change-Id: I9eb8eecb7ac5f6fbf8e87f5c219b3f50dbd18c87
Java modules have been unused for a few years, add a few very basic
tests to exercise the modules as they are brought up to date.
Test: java_test.go
Change-Id: Ib23fc065674a61308333130ff1a992525b92e705