Avoid retries in e2e tests (#260)

The new retry-request behavior was causing timeouts on the e2e tests. We
avoid this by using request instead.

PR-URL: #260

Author: matthewloring

test/fixtures/fib.js

@@ -21,6 +21,11 @@ function fib(n) {
  * limitations under the License.
  */
 
+var proxyquire = require('proxyquire');
+proxyquire('gcp-metadata', {
+  'retry-request': require('request')
+});
+
 var debuglet = require('../..').start({
   debug: {
     logLevel: 2,