Fixes build script dependency building

* For mvn process-sources to work correctly in eclipse, it is necessary to
  also build the org.teiid.datatools plugins. If these have not been
  previously built in the local mvn repo then the auto-builder in Eclipse
  fails.

* This is annoying since these plugins are only required for the tycho TP
  which is not even executed during the process-sources phase. An Eclipse
  bug is currently open for this issue at
  https://bugs.eclipse.org/bugs/show_bug.cgi?id=353889

* Removes the unnecessary generate-javacc profile since it is no longer
  used or initiated.