bug 452266: Exceptions in AbstractPage#execPageActivated and
AbstractPage#execPageDeactivated should be handled by
IExceptionHandlerService 
https://bugs.eclipse.org/bugs/show_bug.cgi?id=452266
Change-Id: I3acd312d1aa1cd424e8a6ca4bce6cdcff2846aae
Signed-off-by: Judith Gull <jgu@bsiag.com>
Reviewed-on: https://git.eclipse.org/r/36693
Tested-by: Hudson CI