Fix for Java 8 compilation. Need to rework hashing algorithm

Note, the hashing algorithm still needs to be figured out. As of Java 8 (and beyond), the classes from the sun.* packages are no longer going to be visible. org.boon.cache.SimpleConcurrentCache is using sun.misc.Hashing.randomHashSeed which is causing issues. Should be a simple enough fix, as we just need to find a new hashing algorithm.I will work on that next.