KNL-1076 Upgrade the antrun plugin to allow parallel builds without warnings.

git-svn-id: https://source.sakaiproject.org/svn/kernel/trunk@124141 66ffb92e-73f9-0310-93c1-f5514f145a0a
KNL-1076 Upgrade the javadoc plugin to allow parallel builds.

git-svn-id: https://source.sakaiproject.org/svn/kernel/trunk@124142 66ffb92e-73f9-0310-93c1-f5514f145a0a