Make sysinfo based on provider

src/sysinfo/ec2.js

@@ -0,0 +1,14 @@
+'use strict';
+
+exports = module.exports = {
+    getIp: getIp
+};
+
+var assert = require('assert'),
+    SysInfoError = require('../sysinfo.js').SysInfoError;
+
+function getIp(callback) {
+    assert.strictEqual(typeof callback, 'function');
+
+    callback(new SysInfoError(SysInfoError.INTERNAL_ERROR, 'Not implemented'));
+}