JBIDE-17254: Luna M7

* Updated repos and versions
* Remove feature org.eclipse.equinox.server.p2 (useless and conflicting)
  -> https://bugs.eclipse.org/bugs/show_bug.cgi?id=434870
* Commented out Birt which doesn't have a M7-compatible build
  -> https://issues.jboss.org/browse/JBIDE-17266