Added loglevel

This patch adds loglevel back in as our logging framework, as
an assistatn for debugging the in/outbound HTTP requests.

Change-Id: I545e27f5c957f9c5c7a2dc73730b9db91600c1ce

package.json

@@ -30,7 +30,8 @@
   "homepage": "http://www.openstack.org/",
   "dependencies": {
     "babel-polyfill": "^6.9.1",
-    "isomorphic-fetch": "^2.2.1"
+    "isomorphic-fetch": "^2.2.1",
+    "loglevel": "^1.4.1"
   },
   "devDependencies": {
     "babel-cli": "^6.10.1",

src/util/http.js

@@ -15,6 +15,7 @@
  */
 
 import 'isomorphic-fetch';
+import log from 'loglevel';
 
 /**
  * This utility class provides an abstraction layer for HTTP calls via fetch(). Its purpose is
@@ -79,7 +80,7 @@ export default class Http {
 
     // Build the wrapper promise.
     return new Promise((resolve, reject) => {
-
+      log.debug('-->', `HTTP ${method}`, url, JSON.stringify(headers), JSON.stringify(body));
       let promise = fetch(request.url, init);
 
       // Fetch will treat all http responses (2xx, 3xx, 4xx, 5xx, etc) as successful responses.
@@ -87,6 +88,7 @@ export default class Http {
       // that it's up to the downstream developer to determine whether what they received is an
       // error or a failed response.
       promise.then((response) => {
+        log.debug('<--', `HTTP ${response.status}`);
         if (response.status >= 400) {
           return reject(response);
         } else {

test/functional/keystoneTest.js

@@ -17,6 +17,9 @@
 import Version from '../../src/util/version';
 import Keystone from "../../src/keystone";
 import config from "./helpers/cloudsConfig";
+import log from 'loglevel';
+
+log.setLevel("DEBUG");
 
 describe("Keystone", () => {
   let devstackConfig = config.clouds.devstack;