tmf: Add perspective element to trace type UI extension point

tmf: Add perspective element to trace type UI extension point

The 'perspective' element is added to the tracetypeui extension point.

The method TmfTraceTypeUIUtils.getPerspectiveId(ITmfTrace) is added.

The associated perspective is set for some plug-in extensions.

Change-Id: Ib62add83a99cd50a6b56b4e0099705ec0f88d168
Signed-off-by: Patrick Tasse <patrick.tasse@gmail.com>
Reviewed-on: https://git.eclipse.org/r/89629
Reviewed-by: Hudson CI
Tested-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Reviewed-by: Matthew Khouzam <matthew.khouzam@ericsson.com>