[MRESOLVER-650] Fix demo for system properties

And update to rc-2

---

https://issues.apache.org/jira/browse/MRESOLVER-650

Author: cstamas

maven-resolver-demos/maven-resolver-demo-snippets/src/main/java/org/apache/maven/resolver/examples/GetDependencyTree.java

@@ -44,7 +44,7 @@ public static void main(String[] args) throws Exception {
         try (RepositorySystem system = Booter.newRepositorySystem(Booter.selectFactory(args));
                 CloseableSession session =
                         Booter.newRepositorySystemSession(system).build()) {
-            Artifact artifact = new DefaultArtifact("org.apache.maven:maven-resolver-provider:3.6.1");
+            Artifact artifact = new DefaultArtifact("io.netty:netty-codec-http:4.1.114.Final");
 
             CollectRequest collectRequest = new CollectRequest();
             collectRequest.setRoot(new Dependency(artifact, ""));

maven-resolver-demos/maven-resolver-demo-snippets/src/main/java/org/apache/maven/resolver/examples/util/Booter.java

@@ -69,6 +69,7 @@ public static SessionBuilder newRepositorySystemSession(RepositorySystem system)
         FileSystem fs = Jimfs.newFileSystem(Configuration.unix());
         SessionBuilder result = new SessionBuilderSupplier(system)
                 .get()
+                .setSystemProperties(System.getProperties())
                 .withLocalRepositoryBaseDirectories(fs.getPath("local-repo"))
                 .setRepositoryListener(new ConsoleRepositoryListener())
                 .setTransferListener(new ConsoleTransferListener())

pom.xml

@@ -114,7 +114,7 @@
     <jettyVersion>10.0.24</jettyVersion>
     <!-- used by supplier and demo only -->
     <maven3Version>3.9.9</maven3Version>
-    <maven4Version>4.0.0-rc-1</maven4Version>
+    <maven4Version>4.0.0-rc-2</maven4Version>
     <minimalMavenBuildVersion>[3.8.8,)</minimalMavenBuildVersion>
     <!-- MRESOLVER-422: keep this in sync with Javadoc plugin configuration (but cannot directly, as this below is range) -->
     <minimalJavaBuildVersion>[21,)</minimalJavaBuildVersion>