... by Piotr Kolaczkowski)

Author: Jacek Lewandowski <lewandowski.jacek@gmail.com>

Closes #4113 from jacek-lewandowski/SPARK-4660-master and squashes the following commits:

a5e84ca [Jacek Lewandowski] SPARK-4660: Use correct class loader in JavaSerializer (copy of PR #3840 by Piotr Kolaczkowski)