Ensuring that objects which fail the preselection get the decoration.

Currently the AsgSelectionAlg doesn't decorate objects that fail the preselection. This is going to be fine in most cases (I guess that the default decoration will be a failure) but if there are any events where none of the events pass the preselection it could mess things up downstream as the container will never acquire that auxdata. This fixes that by decorating them with the default failed accept taken from the selection tool.

Tagging @krumnack for comments.