tmf: Bug 436491: Fix Synchronize Traces handling

tmf: Bug 436491: Fix Synchronize Traces handling

- Refresh supplementary files for each element as soon as they are
created.

- Dispose traces and experiment instances when they are no longer
needed.

- Update the experiment element traces only after instances have been
disposed.

- Fix TmfTraceElement.copy() to use the correct resource according to
its element path.

- Fix TmfTraceElement.copy() to avoid manually creating a new
TmfTraceElement and return the one created by the navigator resource
handler instead.

- Temporarily move synchronization.bin file during experiment update
then restore it to its original location.

Change-Id: I87b3be4dccaf2747fed70eabf63a2f521424b3cb
Signed-off-by: Patrick Tasse <patrick.tasse@gmail.com>
Reviewed-on: https://git.eclipse.org/r/26761
Tested-by: Hudson CI