Refs #11288: Made resource-registry more RESTful

Task-Url: https://support.d4science.org/issues/11288

git-svn-id: https://svn.d4science.research-infrastructures.eu/gcube/trunk/information-system/resource-registry@169060 82a268e6-3cf1-43bd-a215-b396298e98cf

src/main/java/org/gcube/informationsystem/resourceregistry/rest/InstancesManager.java

@@ -162,7 +162,7 @@ public class InstancesManager {
 		
 		boolean create = false;
 		try {
-			erManagement.read();
+			erManagement.exists();
 		} catch(NotFoundException e) {
 			create = true;
 		}