JBIDE-13863, MODETOOLS-61, MODETOOLS-62, MODETOOLS-63 Modified Site Pom

JBIDE-13863 org.junit4 replaced w/ org.junit; please update your test plugins' manifest.mf files
MODETOOLS-61 Custom Workspace Areas Entered Previously By User Should Be Offered As A Choice In the Publish Dialog
MODETOOLS-62 REST Test Feature Description Should Be Changed To Indicate It Is A Test Feature
MODETOOLS-63 Upgrade Plugins, Features, Site, And Poms To Version 3.3
Previous commit also fixed JBIDE-13863 but forgot to mention that. This commit comments out update.site.description and target.eclipse.version pom variables as those are now build parameters.