* removed some deprecated classes (related to JSPWIKI-303), targetted to be removed on 2.10. Specifically: 
  - o.a.w.FileUtil: in favour of o.a.w.util.FileUtil
  - o.a.w.TextUtil: in favour of o.a.w.util.TextUtil
  - o.a.w.filters.FilterManager: in favour of o.a.w.filters.DefaultFilterManager
  - o.a.w.plugin.PluginManager: in favour of o.a.w.plugin.DefaultPluginManager

git-svn-id: https://svn.apache.org/repos/asf/incubator/jspwiki/trunk@1490477 13f79535-47bb-0310-9956-ffa450edef68