Honore Vasconcelos

Implementation of [TableCache.java](https://github.com/dain/leveldb/blob/b2ac7277d202c3ca579d03a7cd73b94ecfea8450/leveldb/src/main/java/org/iq80/leveldb/impl/TableCache.java#L58) use [Finalizer.java](https://github.com/dain/leveldb/blob/b2ac7277d202c3ca579d03a7cd73b94ecfea8450/leveldb/src/main/java/org/iq80/leveldb/util/Finalizer.java) to close sst files. `Finalizer.java` use [phantom reference](https://docs.oracle.com/javase/8/docs/api/java/lang/ref/PhantomReference.html) to delay table/file handle close; so file handle may be closed long after DB has (tried) delete...