tmf: Tweak ITmfStateSystemAnalysisModule

tmf: Tweak ITmfStateSystemAnalysisModule

- Decouple it from TmfStateSystemAnalysisModule, rename it to
  ITmfAnalysisModuleWithStateSystems. An analysis module could
  expose state systems independently of using the abstract class
  or not.

- Change the Map return to separate methods. I'm not very happy
  about getStateSystemId(), but the State System Explorer currently
  needs it. Ideally, the ID could be stored in the state system itself,
  so that this method would not be needed.

Change-Id: I1fcf20384c00b47578309451691f59fd0f438053
Signed-off-by: Alexandre Montplaisir <alexmonthy@voxpopuli.im>
Reviewed-on: https://git.eclipse.org/r/20247
Tested-by: Hudson CI
Reviewed-by: Genevieve Bastien <gbastien+lttng@versatic.net>
IP-Clean: Genevieve Bastien <gbastien+lttng@versatic.net>
Tested-by: Genevieve Bastien <gbastien+lttng@versatic.net>