Improvements to Oomph setup

Improvements to Oomph setup

-The Eclipse ini redirection makes your IDE use the local setup from
your git clone for that IDE's setup. This way you can edit your setup,
test the changes locally, and then commit it.
-Add features necessary in the Eclipse installation so that you can use
any Eclipse package to develop Trace Compass. For example, you can
select Eclipse for C/C++ and it will still install PDE, etc.

Change-Id: I06a2700a79b724ade54f5c961f64835ddc5a8dd0
Signed-off-by: Marc-Andre Laperle <marc-andre.laperle@ericsson.com>
Reviewed-on: https://git.eclipse.org/r/64815
Reviewed-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Tested-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Reviewed-by: Hudson CI