WebDriverFactory: properly fix warning from CheckStyle.

No functional changes.

Author: php-coder

src/main/config/checkstyle-suppressions.xml

@@ -10,7 +10,6 @@
 	<suppress checks="HideUtilityClassConstructor" files="ru.mystamps.web.entity" />
 	<suppress checks="HideUtilityClassConstructor" files="ru.mystamps.web.tests.page.element.Form" />
 
-	<suppress checks="AbstractClassName" files="ru.mystamps.web.tests.WebDriverFactory" />
 	<suppress checks="AbstractClassName" files="ru.mystamps.web.tests.cases.WhenAnyUserAtAnyPage" />
 	<suppress checks="AbstractClassName" files="ru.mystamps.web.tests.cases.WhenAnyUserAtAnyPageWithForm" />
 

src/test/java/ru/mystamps/web/tests/WebDriverFactory.java

@@ -20,7 +20,7 @@
 import org.openqa.selenium.WebDriver;
 import org.openqa.selenium.htmlunit.HtmlUnitDriver;
 
-public final class WebDriverFactory {
+public abstract class WebDriverFactory {
 
 	private static WebDriver driver;