Rename protocol formatter class

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

@@ -12,7 +12,7 @@ import static org.junit.Assert.assertEquals;
 
 @RunWith(RobolectricGradleTestRunner.class)
 @Config(constants = BuildConfig.class, sdk = 21)
-public class ProtocolTest {
+public class ProtocolFormatterTest {
 
     @Test
     public void testFormatRequest() throws Exception {
@@ -20,7 +20,7 @@ public class ProtocolTest {
         Location location = new Location("gps");
         location.setTime(0);
 
-        String url = Protocol.formatRequest("localhost", 5055, "123456789012345", location, 0);
+        String url = ProtocolFormatter.formatRequest("localhost", 5055, "123456789012345", location, 0);
 
         assertEquals("http://localhost:5055?id=123456789012345&timestamp=0&lat=0.0&lon=0.0&speed=0.0&bearing=0.0&altitude=0.0&batt=0.0", url);