Add updated repo to ubuntu to use newer version of ansible

Required for new features

.kitchen.yml

@@ -14,7 +14,9 @@ platforms:
     driver_config:
       image: electrical/ubuntu:14.04
       privileged: true
-      provision_command: apt-get -y -q install ansible python-apt python-pycurl ruby
+      provision_command:
+        - echo 'deb http://ppa.launchpad.net/ansible/ansible/ubuntu trusty main' >> /etc/apt/sources.list
+        - apt-get -y -q install ansible python-apt python-pycurl ruby
       use_sudo: false
   - name: debian-7
     driver_config: