ST6RI-909 Corrected MembershipImportAdapter::importMemberships.

- Added check if importedElement is excluded before recursing.

Author: seidewitz

org.omg.sysml/src/org/omg/sysml/adapter/MembershipImportAdapter.java

@@ -49,7 +49,7 @@ public void importMemberships(EList<Membership> importedMemberships, Set<Namespa
 			importedMemberships.add(importedMembership);
 			if (target.isRecursive()) {
 				Element importedElement = importedMembership.getMemberElement();
-				if (importedElement instanceof Namespace) {
+				if (importedElement instanceof Namespace && !excluded.contains(importedElement)) {
 					Collection<Membership> namespaceMembership = 
 							NamespaceUtil.getVisibleMembershipsFor((Namespace)importedElement, excluded, true, target.isImportAll());
 					importedMemberships.addAll(namespaceMembership);