Merge pull request #501 from jborgers/master-javaversionstest

removed testing java20 and java22, updated readme to support starting java 8

Author: stokpop

README.md

@@ -28,7 +28,7 @@ Use version 4.0+ for child plugins with custom rules written in PMD 7, such as [
 Sonar-PMD analyzes the given source code with the Java source version defined in your Gradle or Maven project.
 In case you are not using one of these build tools, or if that does not match the version you are using, set the `sonar.java.source` property to tell PMD which version of Java your source code complies to. 
 
-Possible values : 1.6 to 1.8/8 to 24-preview
+Possible values : 8 to 24 and 24-preview
 
 ## Table of supported versions
 | Sonar-PMD Plugin       |  3.4.0          | 3.5.0         | 3.5.1         | 4.0.0      |

integration-test/src/test/java/com/sonar/it/java/suite/PmdIT.java

@@ -47,7 +47,7 @@ static void startSonar() {
     }
 
     @ParameterizedTest
-    @EnumSource(value = DefinedJavaVersion.class, mode = EnumSource.Mode.INCLUDE, names = {"JAVA_1_8", "JAVA_11", "JAVA_17", "JAVA_20", "JAVA_21", "JAVA_22", "JAVA_23", "JAVA_24", "JAVA_24_PREVIEW"})
+    @EnumSource(value = DefinedJavaVersion.class, mode = EnumSource.Mode.INCLUDE, names = {"JAVA_1_8", "JAVA_11", "JAVA_17", "JAVA_21", "JAVA_23", "JAVA_24", "JAVA_24_PREVIEW"})
     void testPmdExtensionsWithDifferentJavaVersions(DefinedJavaVersion version) {
 
         // given

pom.xml

@@ -100,7 +100,7 @@
     <version.sonar-packaging.plugin>1.23.0.740</version.sonar-packaging.plugin>
     <sonar-plugin-api-impl.version>25.1.0.102122</sonar-plugin-api-impl.version>
     <sonar-plugin-api.version>11.1.0.2693</sonar-plugin-api.version>
-    <sonar-orchestrator.version>5.1.0.2254</sonar-orchestrator.version>
+    <sonar-orchestrator.version>5.2.0.2403</sonar-orchestrator.version>
     <sonar-ws-client.version>5.1</sonar-ws-client.version>
     <!-- Technical settings -->
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

sonar-pmd-plugin/src/main/java/org/sonar/plugins/pmd/PmdTemplate.java

@@ -40,8 +40,6 @@ public class PmdTemplate {
 
     private static Map<String, String> prepareVersions() {
         final Map<String, String> versions = new HashMap<>();
-        versions.put("6", "1.6");
-        versions.put("7", "1.7");
         versions.put("8", "1.8");
         versions.put("1.9", "9");
         versions.put("1.10", "10");