add default nested entities in adaptable entities

tools.descartes.dni.adaptation/model/DNIMM3AP.xcore

tools.descartes.dni.adaptation/plugin.properties

...ation/src/tools/descartes/dni/dnimm3ap/AdaptableLink.java

...ols/descartes/dni/dnimm3ap/AdaptableNetworkInterface.java

...ation/src/tools/descartes/dni/dnimm3ap/AdaptableNode.java

...s/descartes/dni/dnimm3ap/AdaptableSdnNodePerformance.java

...tation/src/tools/descartes/dni/dnimm3ap/DNIAPPackage.java

.../tools/descartes/dni/dnimm3ap/impl/AdaptableLinkImpl.java

...rtes/dni/dnimm3ap/impl/AdaptableNetworkInterfaceImpl.java

.../tools/descartes/dni/dnimm3ap/impl/AdaptableNodeImpl.java

...es/dni/dnimm3ap/impl/AdaptableSdnNodePerformanceImpl.java

...c/tools/descartes/dni/dnimm3ap/impl/DNIAPPackageImpl.java

...rtes/dni/dnimm3ap/provider/AdaptableLinkItemProvider.java

...mm3ap/provider/AdaptableNetworkInterfaceItemProvider.java

...rtes/dni/dnimm3ap/provider/AdaptableNodeItemProvider.java

...3ap/provider/AdaptableSdnNodePerformanceItemProvider.java