Move the target platform back to normal parent

* Since JBIDE-11121 parent points to 4.1.0, we are in danger of using
  a 4.1.0 TP to do the merging with and not good to keep using a forked
  parent. As the target has been placed under version control anyway, there
  is no need for this parent at this time. Only when regenerating the
  target will it be necessary (maybe) to change over.