Rename JUnit4TestShouldUseAfterAnnotation

- Call it JUnitTestShouldUseAfterAnnotation instead as it not only
   applies to JUnit4
 - Improve the doc to further clarify it's usages

pmd-java/src/main/resources/category/java/bestpractices.xml

@@ -666,15 +666,20 @@ public class GoodTest {
         </example>
     </rule>
 
-    <rule name="JUnit4TestShouldUseAfterAnnotation"
+    <rule name="JUnit4TestShouldUseAfterAnnotation" deprecated="true" ref="JUnitTestShouldUseAfterAnnotation" />
+
+    <rule name="JUnitTestShouldUseAfterAnnotation"
           language="java"
           since="4.0"
           message="JUnit 4 tests that clean up tests should use the @After annotation, JUnit5 tests should use @AfterEach or @AfterAll"
           class="net.sourceforge.pmd.lang.rule.xpath.XPathRule"
-          externalInfoUrl="${pmd.website.baseurl}/pmd_rules_java_bestpractices.html#junit4testshoulduseafterannotation">
+          externalInfoUrl="${pmd.website.baseurl}/pmd_rules_java_bestpractices.html#junittestshoulduseafterannotation">
         <description>
-In JUnit 3, the tearDown method was used to clean up all data entities required in running tests.
-JUnit 4 skips the tearDown method and executes all methods annotated with @After after running each test.
+This rule detects methods called tearDown() that are not properly annotated as a setup method.
+This is primarily intended to assist in upgrading from JUnit 3, where tear down methods were required to be called tearDown().
+To a lesser extent, this may help detect omissions under newer JUnit versions, as long as you are following this convention to name the methods.
+
+JUnit 4 will only execute methods annotated with @After after running each test.
 JUnit 5 introduced @AfterEach and @AfterAll annotations to execute methods after each test or after all tests in the class, respectively.
         </description>
         <priority>3</priority>

pmd-java/src/test/java/net/sourceforge/pmd/lang/java/rule/bestpractices/JUnitTestShouldUseAfterAnnotationTest.java

@@ -9,7 +9,7 @@ import org.junit.Before;
 
 import net.sourceforge.pmd.test.PmdRuleTst;
 
-class JUnit4TestShouldUseAfterAnnotationTest extends PmdRuleTst {
+class JUnitTestShouldUseAfterAnnotationTest extends PmdRuleTst {
     // no additional unit tests
 
     public static class BaseTest {