Redesign AccessControlSettingOperation using ContextExclusionFilterFactory

[ldko]

Currently AccessControlSettingOperation seems awkward as it implements BooleanOperator with its isTrue() method directly setting the exclusionFilter on the WaybackRequest instance before always returning true. To be consistent with development moving toward creating ExclusionFilters by implementing ContextExclusionFilterFactory, AccessControlSettingOperation should be redesigned for OpenWayback 3.0. This issue stems from the discussion on issue #259 where Kenji recommended:

"Toward 3.0, I'd propose redesigning AccessControlSettingOperation as ContextExclusionFilterFactory and have it set up through AccessPoint.exclusionFactory. It'll require adding WaybackRequest (or narrower interface) to its getExclusionFilter method."