Update dependency com.thoughtworks.xstream:xstream to v1.4.13
Update dependency com.thoughtworks.xstream:xstream to v1.4.13

jonathanmtran/uPortal,ChristianMurphy/uPortal,ChristianMurphy/uPortal,Jasig/uPortal,jonathanmtran/uPortal,Jasig/uPortal,mgillian/uPortal,bjagg/uPortal,ChristianMurphy/uPortal,mgillian/uPortal,bjagg/uPortal,bjagg/uPortal,mgillian/uPortal,Jasig/uPortal,jonathanmtran/uPortal