Fix for the timeout

Author: jvarenina

geode-wan/src/distributedTest/java/org/apache/geode/cache/wan/internal/cli/commands/WanCopyRegionCommandDistributedTest.java

@@ -34,11 +34,13 @@
 import static org.apache.geode.test.awaitility.GeodeAwaitility.await;
 import static org.apache.geode.test.dunit.IgnoredException.addIgnoredException;
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 import java.text.NumberFormat;
 import java.text.ParseException;
 import java.util.Arrays;
 import java.util.Collections;
+import java.util.LinkedList;
 import java.util.List;
 import java.util.Locale;
 import java.util.Properties;
@@ -1166,12 +1168,20 @@ private int create2WanSitesAndClient(VM locatorInA, List<VM> serversInA, String
 
   private void createSender(boolean isParallelGatewaySender, List<VM> servers,
       String senderId, int remoteDsId) {
-    for (VM server : servers) {
-      server.invoke(() -> createSender(senderId, remoteDsId, isParallelGatewaySender,
-          100, 10, false,
-          false, null, true));
+    List<AsyncInvocation<Void>> tasks = new LinkedList<>();
+    for (VM vm : servers) {
+      tasks.add(vm.invokeAsync(
+          () -> vm.invoke(() -> createSender(senderId, remoteDsId, isParallelGatewaySender,
+              100, 10, false,
+              false, null, false))));
+    }
+    for (AsyncInvocation<Void> invocation : tasks) {
+      try {
+        invocation.await();
+      } catch (InterruptedException e) {
+        fail("Creating and starting senders was interrupted");
+      }
     }
-    startSenderInVMsAsync(senderId, servers.toArray(new VM[0]));
   }
 
   private void createReceivers(List<VM> serversInB, VM serverInC) {