finish the multinode ubuntu k8s setup script and guide ,tested ok

cluster/ubuntu-cluster/default_scripts/kube-apiserver

@@ -0,0 +1,14 @@
+# Kube-Apiserver Upstart and SysVinit configuration file
+
+# Customize kube-apiserver binary location 
+# KUBE_APISERVER="/opt/bin/kube-apiserver"
+
+# Use KUBE_APISERVER_OPTS to modify the start/restart options
+
+KUBE_APISERVER_OPTS="--address=0.0.0.0 \
+--port=8080 \
+--etcd_servers=http://127.0.0.1:4001 \
+--logtostderr=true \
+--portal_net=11.1.1.0/24"
+
+# Add more envionrment settings used by kube-apiserver here