title: Problem Authenticating requests with NEWMAN while building on TRAVIS CI
body: <p>I have made a POSTMAN COLLECTION that tests GOOGLE BOOKS API responses to POST requests.<br>
  I run this collection with NEWMAN and 2 environment variables : apiKey and dynamicToken.<br>
  I then push the project on github using TRAVIS CI to run the tests.</p>
  <p>I am encountering remote authentification issues.</p>
  <p>While locally (postman or newman cli) authentification works fine : responses status code 200</p>
  <p>Once deployed and ran with TRAVIS authentification fails : responses status code 401</p>
  <p>I have tried several ways to set the variables that handles authentification.</p>
  <p>And finally to isolate the issue I ran the command with hard scripted apyKey and Token.</p>
  <p>Here is the command that works locally but not on TRAVIS:</p>
  <p><code>newman run gbook_test.postman_collection.json --env-var &quot;apiKey=&lt;apikeyValue&gt;&quot; --env-var &quot;dynamicToken=&lt;tokenValue&gt;&quot; -d gbook_test.postman_datas.json</code></p>
  <p>Where</p>
  <ul>
  <li><code>&lt;apikeyValue&gt;</code>: is the valid value of my apikey,</li>
  <li><code>&lt;tokenValue&gt;</code>: is the valid value of my token.</li>
  </ul>
  <p>What am I missing ?</p>
  <p>Thanks.</p>