tmf: Fix another TimeRangeException in TmfStateStatistics

tmf: Fix another TimeRangeException in TmfStateStatistics

The exception occurs when the requested range is completely out of the
range of the state system, for example with an experiment containing two
traces that do not intersect.

Also changed exception handling so that StateSystemDisposedException is
ignored, and runtime exceptions are not caught.

Change-Id: Icbe242c7c875ebe7873b0ce88b09499444bc8e00
Signed-off-by: Patrick Tasse <patrick.tasse@gmail.com>
Reviewed-on: https://git.eclipse.org/r/25212
Tested-by: Hudson CI
Reviewed-by: Marc-Andre Laperle <marc-andre.laperle@ericsson.com>