npm run lint fails

[Yujun Zhang]

```
➜ eslint-config-openstack git:(master) npm run lint

> eslint-config-openstack@2.0.0 lint /Users/yujunz/Develop/eslint-config-openstack
> eslint ./

Cannot find module 'eslint-config-openstack' from '/Users/yujunz/Develop/eslint-config-openstack/node_modules'
Referenced from: /Users/yujunz/Develop/.eslintrc
Error: Cannot find module 'eslint-config-openstack' from '/Users/yujunz/Develop/eslint-config-openstack/node_modules'
Referenced from: /Users/yujunz/Develop/.eslintrc
    at Function.module.exports [as sync] (/Users/yujunz/Develop/eslint-config-openstack/node_modules/resolve/lib/sync.js:33:11)
    at resolve (/Users/yujunz/Develop/eslint-config-openstack/node_modules/eslint/lib/config/config-file.js:416:38)
    at load (/Users/yujunz/Develop/eslint-config-openstack/node_modules/eslint/lib/config/config-file.js:435:24)
    at /Users/yujunz/Develop/eslint-config-openstack/node_modules/eslint/lib/config/config-file.js:355:36
    at Array.reduceRight (native)
    at applyExtends (/Users/yujunz/Develop/eslint-config-openstack/node_modules/eslint/lib/config/config-file.js:338:28)
    at Object.load (/Users/yujunz/Develop/eslint-config-openstack/node_modules/eslint/lib/config/config-file.js:462:22)
    at loadConfig (/Users/yujunz/Develop/eslint-config-openstack/node_modules/eslint/lib/config.js:67:33)
    at getLocalConfig (/Users/yujunz/Develop/eslint-config-openstack/node_modules/eslint/lib/config.js:129:23)
    at Config.getConfig (/Users/yujunz/Develop/eslint-config-openstack/node_modules/eslint/lib/config.js:223:22)

npm ERR! Darwin 15.5.0
npm ERR! argv "/Users/yujunz/.nvm/versions/node/v6.2.2/bin/node" "/Users/yujunz/.nvm/versions/node/v6.2.2/bin/npm" "run" "lint"
npm ERR! node v6.2.2
npm ERR! npm v3.9.5
npm ERR! code ELIFECYCLE
npm ERR! eslint-config-openstack@2.0.0 lint: `eslint ./`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the eslint-config-openstack@2.0.0 lint script 'eslint ./'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the eslint-config-openstack package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! eslint ./
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs eslint-config-openstack
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! npm owner ls eslint-config-openstack
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR! /Users/yujunz/Develop/eslint-config-openstack/npm-debug.log
```