TMF: Add supplementary folder to experiments

TMF: Add supplementary folder to experiments

Just like traces, experiments can save information in supplementary
files on disk (see bug 400949).
* Added class TmfWithFolderElement that TmfTraceElement and
  TmfExperimentElement extends
* TmfExperiment constructors are modified/added to receive a
  IResource as parameter
* Call to constructors are modified in the .ui code to add the
  resources
* Added calls to delete/copy/rename supplementary folder

Change-Id: Ic6996ca2c39bd3ea499521349f04bfc7c237b419
Signed-off-by: Geneviève Bastien <gbastien+lttng@versatic.net>
Reviewed-on: https://git.eclipse.org/r/10435
Reviewed-by: Bernd Hufmann <bhufmann@gmail.com>
IP-Clean: Bernd Hufmann <bhufmann@gmail.com>
Tested-by: Bernd Hufmann <bhufmann@gmail.com>
Tested-by: Hudson CI
Reviewed-by: Alexandre Montplaisir <alexmonthy@voxpopuli.im>
IP-Clean: Alexandre Montplaisir <alexmonthy@voxpopuli.im>
Tested-by: Alexandre Montplaisir <alexmonthy@voxpopuli.im>