Merged from STRUTS_2_3_14_X

      Disable eval expressions [from revision 1469249]
WW-4063
Improved security  by making static method attribute immutable [from revision 1486054]
WW-4063
Skipping unneeded translation for included parameters [from revision 1486076]
WW-4063
Testcase modification after refactoring [from revision 1486164]
WW-4063
Testcases for double parameter evaluation problems [from revision 1486576]

git-svn-id: https://svn.apache.org/repos/asf/struts/struts2/trunk@1486633 13f79535-47bb-0310-9956-ffa450edef68