Starting with Java5 enhancements in S2.
This patch applies required changes to S2 related to the "generified xwork"
XWork Java5 enhancements
o added generics where possible
o use parameterizes Collection classes where possible
o converted for to for-each loops
o optimized imports
o updated tests
o aligned parameter types with Struts2
o fixed some minor bugs
git-svn-id: https://svn.apache.org/repos/asf/struts/struts2/trunk@670170 13f79535-47bb-0310-9956-ffa450edef68
Rainer Hermanns