Feature mussel lb smoketests

### add update task
```$ mussel.sh load_balancer update lb-xxx```

### http load balancer cluster : single std instance

* rename file
   * t.lb.node.single.sh -> t.lb.http.node.single.sh

### http load balancer cluster : multi std instances

```http-client -> lb(tcp/80) -> lbnode(tcp/80)```

* launching lb instance x1
* launching std instance `lbnode`  x3
   * `lbnode` always responds its own instance-id when getting `http://(instance ipaddr)/`.
* waiting for lb-instance httpd to be ready
* waiting for std-instance httpd to be ready
* http response?
  * retry until respoinse equals i-xxx1
  * retry until respoinse equals i-xxx2
  * retry until respoinse equals i-xxx3
* terminating lb-instance
* terminating std-instances

### ssl server certification installation

* just self sigined server cerification installation