Fix ubuntu vagrant box nodesets

Without this patch, the nodesets incorrectly define a vagrantcloud vm
to install, resulting in the following error:

 > The box you're adding has a name different from the name you
 > requested.

This patch uses the trusty vagrant nodeset from the puppetlabs-apache
module and updates the default nodeset as well. Fill do the same for
the centos nodeset in a separate patch after RedHat tests are
implemented.

Change-Id: Iffac76b48d496d93b9cb63323ac103619319de47

spec/acceptance/nodesets/default.yml

@@ -3,8 +3,8 @@ HOSTS:
     roles:
       - master
     platform: ubuntu-14.04-amd64
-    box : trusty-server-cloudimg-amd64-vagrant-disk1
-    box_url : puppetlabs/ubuntu-14.04-64-nocm
+    box : puppetlabs/ubuntu-14.04-64-nocm
+    box_url : https://vagrantcloud.com/puppetlabs/ubuntu-14.04-64-nocm
     hypervisor : vagrant
 CONFIG:
   log_level   : debug

spec/acceptance/nodesets/ubuntu-server-1404-x64.yml

@@ -3,8 +3,8 @@ HOSTS:
     roles:
       - master
     platform: ubuntu-14.04-amd64
-    box : trusty-server-cloudimg-amd64-vagrant-disk1
-    box_url : puppetlabs/ubuntu-14.04-64-nocm
+    box : puppetlabs/ubuntu-14.04-64-nocm
+    box_url : https://vagrantcloud.com/puppetlabs/ubuntu-14.04-64-nocm
     hypervisor : vagrant
 CONFIG:
   log_level   : debug