Fix shared test file name

Change-Id: Ib3c42fedbe23453ff65831f91e3baaae45dda38b

shared/src/test/java/com/vaadin/shared/util/SharedUtilTests.java → shared/src/test/java/com/vaadin/shared/util/SharedUtilTest.java

@@ -8,7 +8,7 @@ import java.util.Locale;
 import org.junit.Assert;
 import org.junit.Test;
 
-public class SharedUtilTests {
+public class SharedUtilTest {
 
     @Test
     public void trailingSlashIsTrimmed() {