Make AbstractWebRequestMatcherTests abstract

Author: sbrannen

spring-test/src/test/java/org/springframework/test/web/servlet/htmlunit/AbstractWebRequestMatcherTests.java

@@ -29,7 +29,7 @@
  * @author Sam Brannen
  * @since 4.2
  */
-public class AbstractWebRequestMatcherTests {
+abstract class AbstractWebRequestMatcherTests {
 
 	protected void assertMatches(WebRequestMatcher matcher, String url) throws MalformedURLException {
 		assertThat(matcher.matches(new WebRequest(new URL(url)))).isTrue();