Conditionally ignore the tests that require JDK 1.7 from Maven Surefire Plugin, but only when building with JDK 1.6 or earlier.
Remove tests for JDK 1.1 and 1.2 from JDKTest, since these can not be run on JDK 1.5+.
Move a test that requires Java 7 from JDKTest to JDK7Test.