spearhead-ea / island / 1160

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travis-ci

feat: add a tool as NDA(Nondestructive assay)

* diag-cli.js will be installed as `diag`
* diag ping -> "pong"
* diag status -> fetch data from status-collector
* can be used for
  * simple diagnosis
  * healthcheck

```
{ timestamp: 1527492360282,
  message: '{"processUptime":"2018-05-28T07:24:04.907Z","measurements":[{"type":"event@system.node.started","requestPerSeconds":0.01,"executedPerSeconds":0.01,"avgReceiveMessageTimeByMQ":10,"avgExecutionTime":11},{"type":"event@system.diagnosis","requestPerSeconds":0.03,"executedPerSeconds":0.03,"avgReceiveMessageTimeByMQ":0,"avgExecutionTime":3.67}]}' }
```

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