SAK-17425 update Tomcat version to 5.5.28. zip added to Sakai Maven2 repo.
SAK-17425 update Tomcat version to 5.5.28. zip added to Sakai Maven2 repo.

git-svn-id: 291858a59550e5d8b06c9cd35f5f6835be0ab041@69187 66ffb92e-73f9-0310-93c1-f5514f145a0a

ox-it/wl-sakai