Add -y to apt-get for IPA builder

Without -y, apt wants an interactive response, which is impossible in
jenkins.

Change-Id: I8d298c5e24a27ff8e3cfd3c8cd83c7961d8d9e0c

modules/openstack_project/files/jenkins_job_builder/config/ironic-python-agent-jobs.yaml

@@ -9,7 +9,7 @@
       - shell: |
           #!/bin/bash -xe
           sudo apt-get update
-          sudo apt-get install docker.io
+          sudo apt-get install -y docker.io
           sudo ln -sf /usr/bin/docker.io /usr/local/bin/docker
           sudo sed -i '$acomplete -F _docker docker' /etc/bash_completion.d/docker.io
           make