Re-instate manual apt update on controller image

Author: pascal

docker-images/controller/Dockerfile

@@ -25,6 +25,9 @@ COPY ./provision.yml /home/ce-dev/ce-provision/provision.yml
 RUN \
   set -x && \
   export DEBIAN_FRONTEND=noninteractive && \  
+  echo 'deb http://ppa.launchpad.net/ansible/ansible/ubuntu trusty main' > /etc/apt/sources.list.d/ansible.list && \
+  apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 93C4A3FD7BB9C367 && \
+  apt-get update && \
   su - ce-dev -c "/usr/bin/ansible-playbook /home/ce-dev/ce-provision/provision.yml" && \
   rm /home/ce-dev/ce-provision/provision.yml && \
   apt-get clean  && \