ref(builder): use ubuntu:14.04 as Dockerfile base image
ref(cache): use ubuntu:14.04 as Dockerfile base image
ref(controller): use ubuntu:14.04 as Dockerfile base image
ref(database): use ubuntu:14.04 as Dockerfile base image
ref(database): update postgres user uid/gid in confd templates
ref(logger): use ubuntu:14.04 as Dockerfile base image
ref(registry): use ubuntu:14.04 as Dockerfile base image
ref(router): use ubuntu:14.04 as Dockerfile base image
ref(tests): use ubuntu:14.04 as Dockerfile base image
chore(pip): update pip installs to 1.5.6
ref(data): use ubuntu:14.04 as Dockerfile base image
Merge pull request #1878 from mboersma/no-deis-base

ref(Dockerfiles): base Dockerfiles on ubuntu:14.04
fix(controller): Use correct entrypoint for run

Running commands in an image build using git push requires to use
‘/runner/init’ as entrypoint, otherwise environment variables inject by
buildpacks are missing.

Fixes #1801, fixes #1568