After modifying persistence.xml to target the "regress" database and adding my username and password to persistence.xml, this test built and ran.

The first two tests fail as reported in the bug report, but the test "testGroupByWithSum" fails with:

1380 [main] ERROR org.hibernate.hql.PARSER -  Unable to locate appropriate constructor on class [org.example.groupbytestcase.entities.DBObject]
[cause=org.hibernate.PropertyNotFoundException: no appropriate constructor in class: org.example.groupbytestcase.entities.DBObject]
Tests run: 3, Failures: 0, Errors: 3, Skipped: 0, Time elapsed: 1.432 sec <<< FAILURE!

I'm on JDK 7, but that shouldn't really matter.

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