Make connector compilable

src/test/java/org/tarantool/TestNodeCommunicationProvider.java

@@ -1,5 +1,7 @@
 package org.tarantool;
 
+import org.tarantool.server.TarantoolInstanceConnection;
+
 import java.io.IOException;
 
 public class TestNodeCommunicationProvider extends SingleNodeCommunicationProvider {
@@ -12,13 +14,12 @@ public TestNodeCommunicationProvider(String address, String username, String pas
     }
 
     @Override
-    public void connect() throws IOException {
+    public TarantoolInstanceConnection connect() throws IOException {
 
         long budget = System.currentTimeMillis() + restartTimeout;
         while (!Thread.currentThread().isInterrupted()) {
             try {
-                super.connect();
-                return;
+                return super.connect();
             } catch (Exception e) {
                 if (budget < System.currentTimeMillis())
                     throw new RuntimeException(e);

src/test/perf/org/tarantool/MyBenchmark.java

@@ -2,6 +2,7 @@
 
 import org.openjdk.jmh.annotations.*;
 import org.tarantool.server.TarantoolBinaryPackage;
+import org.tarantool.server.TarantoolInstanceConnection;
 
 import java.io.IOException;
 import java.nio.ByteBuffer;
@@ -30,8 +31,8 @@ public SocketChannel get() {
      */
     private static class DodgeCommunication implements NodeCommunicationProvider {
         @Override
-        public void connect() throws IOException {
-
+        public TarantoolInstanceConnection connect() throws IOException {
+            return null;
         }
 
         @Override