reuse an existing instance of a	     data component type only for
        access components, this allow to have subcomponent-specific
        properties to be correctly attached to the corresponing
	instance of subcomponents



git-svn-id: https://tecsw.estec.esa.int/svn/taste/trunk/ocarina@1486 129961e7-ef38-4bb5-a8f7-c9a525a55882