Currently JarFile and MRJAR tests use sun.misc.Version to retrieve the major runtime version. They should be
updated to use the new JDK specific Version API.

Note: There is an issue, JDK-8144062, to revisit the JDK specific Version API to determine if it should be moved, or
even standardized. The changes being proposed here may need to be updated, in a trivial way, in the future,
but this issue is intending to break the dependency on sun.misc.Version so that JDK-8150162 can make progress.
Additionally, the future refactoring will most likely be trivial.