Reload on startup content resource initialize item does a merge instead of a replace

When an initialize item is marked as hippo:reloadonstartup the initialize item is reprocessed when a new build number is detected. For cnd's this works fine since a cnd import effectively replaces the existing cnd. For content resources however the system attempts to merge the xml with the existing node. The expected behavior however is that the entire content of the node is replaced. The reload on startup functionality should therefore attempt to remove the existing node before bootstrapping it again.