fix: auth v4 canonical request resource

fixes #177

lib/auth/v4/constructStringToSign.js

@@ -1,6 +1,7 @@
 'use strict'; // eslint-disable-line strict
 
 const crypto = require('crypto');
+const url = require('url');
 
 const createCanonicalRequest = require('./createCanonicalRequest');
 
@@ -20,7 +21,7 @@ function constructStringToSign(params) {
 
     const canonicalReqResult = createCanonicalRequest({
         pHttpVerb: request.method,
-        pResource: request.path,
+        pResource: url.parse(request.path).pathname,
         pQuery: query,
         pHeaders: request.headers,
         pSignedHeaders: signedHeaders,