graphdb now handles request from external api client only on https

dnet-ariadneplus-graphdb-publisher/test/java/eu/dnetlib/ariadneplus/GraphDbReaderTest.java

@@ -30,7 +30,7 @@ public class GraphDbReaderTest {
 
     private static String username = "reader";
     private static String pwd = "***";
-    private static String graphDBUrl = "http://graphdb-test.ariadne.d4science.org:7200";
+    private static String graphDBUrl = "https://graphdb-test.ariadne.d4science.org";
     private static String graphDBRepository = "ariadneplus-ts01";
     private RepositoryConnection connection;
     private RemoteRepositoryManager manager;