Clean up warnings in tests about anonymous callable.

Convert them to static, named classes.

core/src/test/java/hudson/LauncherTest.java

@@ -26,11 +26,11 @@
 
 import hudson.model.StreamBuildListener;
 import hudson.model.TaskListener;
-import hudson.remoting.Callable;
 import hudson.util.ProcessTree;
 import hudson.util.StreamTaskListener;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
+
 import jenkins.security.MasterToSlaveCallable;
 import org.apache.commons.io.FileUtils;
 import static org.junit.Assert.*;
@@ -63,7 +63,7 @@ public class LauncherTest {
             long end = System.currentTimeMillis();
             long terminationTime = end - start;
             assertTrue("Join did not finish promptly. The completion time (" + terminationTime + "ms) is longer than expected 15s", terminationTime < 15000);
-            channels.french.call(NOOP); // this only returns after the other side of the channel has finished executing cancellation
+            channels.french.call(new NoopCallable()); // this only returns after the other side of the channel has finished executing cancellation
             Thread.sleep(2000); // more delay to make sure it's gone
             assertNull("process should be gone",ProcessTree.get().get(Integer.parseInt(FileUtils.readFileToString(tmp).trim())));
 
@@ -76,11 +76,11 @@ public class LauncherTest {
             // hangs and on slave machine pgrep sleep => one process; after manual kill, script returns.
     }
 
-    private static final Callable<Object,RuntimeException> NOOP = new MasterToSlaveCallable<Object,RuntimeException>() {
+    private static class NoopCallable extends MasterToSlaveCallable<Object,RuntimeException> {
         public Object call() throws RuntimeException {
             return null;
         }
-    };
+    }
 
     @Issue("JENKINS-15733")
     @Test public void decorateByEnv() throws Exception {

core/src/test/java/hudson/os/SUTester.java

@@ -5,19 +5,19 @@
 import java.nio.file.Files;
 import jenkins.security.MasterToSlaveCallable;
 
-import java.io.FileOutputStream;
-
 /**
  * @author Kohsuke Kawaguchi
  */
 public class SUTester {
     public static void main(String[] args) throws Throwable {
-        SU.execute(StreamTaskListener.fromStdout(),"kohsuke","bogus",new MasterToSlaveCallable<Object, Throwable>() {
-            public Object call() throws Throwable {
-                System.out.println("Touching /tmp/x");
-                Files.newOutputStream(new File("/tmp/x").toPath()).close();
-                return null;
-            }
-        });
+        SU.execute(StreamTaskListener.fromStdout(),"kohsuke","bogus", new TouchingCallable());
+    }
+
+    private static class TouchingCallable extends MasterToSlaveCallable<Object, Throwable> {
+        public Object call() throws Throwable {
+            System.out.println("Touching /tmp/x");
+            Files.newOutputStream(new File("/tmp/x").toPath()).close();
+            return null;
+        }
     }
 }