BACM11 — Replace metaclass Resource with metaclass AbstractBusinessObject

Resource only appears as the target of a ResourceRole relationship. It would only be used in a model in conjunction with another metaclass such as BusinessObject. So a building used as a resource would have two metaclasses: BusinessObject and Resource. The Resource metaclass is only needed to allow use of the ResourceRole relationship. Changing the metamodel so that AbstractBusinessObject is the target of ResourceRole eliminates the need to define model elements with two metaclasses to allow them to be used with ResourceRole.