Bug 453706 - Uncategorize RCP and Testing features

Bug 453706 - Uncategorize RCP and Testing features

The RCP features should not be installed by users but should be available
for RCP extending Trace Compass. The Testing feature is also not meant to
be installed by users manually.

Change-Id: I208d49d8a10d7898969cad73b621b268756b43f5
Signed-off-by: Marc-Andre Laperle <marc-andre.laperle@ericsson.com>
Reviewed-on: https://git.eclipse.org/r/37420
Reviewed-by: Bernd Hufmann <bernd.hufmann@ericsson.com>
Tested-by: Bernd Hufmann <bernd.hufmann@ericsson.com>
Reviewed-by: Hudson CI