ReaperTest needed another mock

Author: jglick

src/test/java/org/csanchez/jenkins/plugins/kubernetes/pod/retention/ReaperTest.java

@@ -41,6 +41,7 @@
 import hudson.Extension;
 import hudson.model.TaskListener;
 import hudson.slaves.ComputerLauncher;
+import hudson.util.StreamTaskListener;
 import io.fabric8.kubernetes.api.model.*;
 import io.fabric8.kubernetes.client.Watcher;
 import io.fabric8.kubernetes.client.server.mock.KubernetesServer;
@@ -649,6 +650,7 @@ private KubernetesSlave addNode(KubernetesCloud cld, String podName, String node
         when(node.getNumExecutors()).thenReturn(1);
         PodTemplate podTemplate = new PodTemplate();
         when(node.getTemplate()).thenReturn(podTemplate);
+        when(node.getRunListener()).thenReturn(StreamTaskListener.fromStderr());
         ComputerLauncher launcher = mock(ComputerLauncher.class);
         when(node.getLauncher()).thenReturn(launcher);
         j.jenkins.addNode(node);