Fix warning, javadocs

Add release notes entry

Author: kwin

RELEASE_NOTES.md

@@ -2,6 +2,12 @@
 
 ## 2.9.2
 
+### Maven Execution JRE used for Tests
+
+Similar to what is done for the Maven Launch Actions the JRE for tests (TestNG, JUnit) is now also derived from
+the Maven execution JRE. Previously this was by default set to the project's JRE (derived from the `maven-compiler-plugin`s target/release configuration).
+The Maven execution JRE is determined from the `maven-enforcer-plugin`s `requireJavaVersion` rule by selecting the best matching installed JRE for the [configured Java version range](https://maven.apache.org/enforcer/enforcer-rules/requireJavaVersion.html).
+
 ### Multi-Release-Jar support
 
 JDT added support for native [https://openjdk.org/jeps/238](Multi-Release) compilation support recently.

org.eclipse.m2e.jdt/src/org/eclipse/m2e/jdt/MavenExecutionJre.java

@@ -108,9 +108,10 @@ public Optional<IVMInstall> getBestMatchingVM() {
   }
 
   /**
-   * The returned ID can be used e.g. as value for {@link IJavaLaunchConfigurationConstants.ATTR_JRE_CONTAINER_PATH}.
+   * The returned container path can be used as value for
+   * {@link IJavaLaunchConfigurationConstants.ATTR_JRE_CONTAINER_PATH}.
    * 
-   * @return the best matching JRE ID, or empty if no matching JRE could be found
+   * @return the best matching JRE container path, or empty if no matching JRE could be found
    */
   public Optional<String> getBestMatchingJreContainerPath() {
     return getBestMatchingVM().map(vm -> JavaRuntime.newJREContainerPath(vm).toPortableString());

org.eclipse.m2e.launching/src/org/eclipse/m2e/internal/launch/MavenLaunchDelegate.java

@@ -31,7 +31,6 @@
 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.CoreException;
-import org.eclipse.core.runtime.ILog;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.Platform;
@@ -65,8 +64,6 @@
 public class MavenLaunchDelegate extends JavaLaunchDelegate implements MavenLaunchConstants {
   private static final Logger log = LoggerFactory.getLogger(MavenLaunchDelegate.class);
 
-  private static final ILog ECLIPSE_LOG = Platform.getLog(MavenLaunchDelegate.class);
-
   private static final String LAUNCHER_TYPE = "org.codehaus.classworlds.Launcher"; //$NON-NLS-1$
 
   //classworlds 2.0