further test refactoring; overall tests execution time is reduced by ~20%

git-svn-id: https://svn.apache.org/repos/asf/incubator/jspwiki/trunk@1431149 13f79535-47bb-0310-9956-ffa450edef68
removed unused import

git-svn-id: https://svn.apache.org/repos/asf/incubator/jspwiki/trunk@1431150 13f79535-47bb-0310-9956-ffa450edef68