Create sync version of request

app/src/test/java/org/traccar/client/RequestManagerTest.java

@@ -1,14 +1,12 @@
 
 package org.traccar.client;
 
-import junit.framework.Assert;
-
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.robolectric.RobolectricGradleTestRunner;
 import org.robolectric.annotation.Config;
 
-import java.lang.Override;
+import static org.junit.Assert.assertTrue;
 
 @RunWith(RobolectricGradleTestRunner.class)
 @Config(constants = BuildConfig.class, sdk = 21)
@@ -17,16 +15,7 @@ public class RequestManagerTest {
     @Test
     public void testSendRequest() throws Exception {
 
-        RequestManager.sendRequest("http://www.google.com", new RequestManager.RequestHandler() {
-            @Override
-            public void onSuccess() {
-                Assert.assertTrue(true);
-            }
-            @Override
-            public void onFailure() {
-                Assert.assertTrue(false);
-            }
-        });
+        assertTrue(RequestManager.sendRequest("http://www.google.com"));
 
     }