Add machine name to dashboard header.

Author: petrillek

provisioning/templates/dashboard.html.j2

@@ -316,6 +316,7 @@
           <section class="jumbotron text-center">
             <a href="https://www.drupalvm.com/"><img src="http://docs.drupalvm.com/en/latest/images/drupal-vm-logo.png" alt="Drupal VM" title="Welcome to Drupal VM" class="img-responsive center-block"></a>
             <p><a href="https://github.com/geerlingguy/drupal-vm">Drupal VM</a> is a VM for local Drupal development, built with Vagrant + Ansible.</p>
+            <p><small>Machine name: <strong>{{ vagrant_machine_name }}</strong></small></p>
             <p><a class="btn btn-primary btn-lg" href="http://docs.drupalvm.com/en/latest/" role="button">Read the documentation</a></p>
           </section>
         </div>