Dump logs at the end of e2e runs.

hack/jenkins/job-configs/kubernetes-e2e.yaml

@@ -21,7 +21,13 @@
             {provider-env}
             {job-env}
             {post-env}
-            timeout -k {kill-timeout}m {timeout}m {runner}
+            if ! timeout -k {kill-timeout}m {timeout}m {runner}; then
+                if [[ -x kubernetes/cluster/log-dump.sh && -d _artifacts ]]; then
+                    echo "Dumping logs for any remaining nodes"
+                    ./kubernetes/cluster/log-dump.sh _artifacts
+                fi
+                exit 1
+            fi
     properties:
         - mail-watcher
     wrappers: