Upgrade s2i builders to inherit from Ubuntu 17.04
We'll decide on our upgrade policy very soon!
Fixes
MODIFY
s2i-builders/conda/Dockerfile
s2i-builders/conda/Dockerfile
-FROM ubuntu:16.10
+FROM ubuntu:17.04
MAINTAINER Yuvi Panda <yuvipanda@gmail.com>

MODIFY
s2i-builders/conda/README.md
s2i-builders/conda/README.md
@@ -5,7 +5,7 @@ This is a builder image for use with [s2i](https://github.com/openshift/source-t
builds a source repository (such as a github repository) into a docker image that is suitable
for use with [JupyterHub](http://github.com/jupyterhub/jupyterhub).
-It is based off Ubuntu 16.10, and uses [virtualenv](https://pypi.python.org/pypi/virtualenv) to
+It is based off Ubuntu 17.04, and uses [virtualenv](https://pypi.python.org/pypi/virtualenv) to
provide a custom python3.5 environment.
It looks for a `requirements.txt` file in the source repository, and installs it into the virtualenv.

MODIFY
s2i-builders/venv/Dockerfile
s2i-builders/venv/Dockerfile
-FROM ubuntu:16.10
+FROM ubuntu:17.04
MAINTAINER Yuvi Panda <yuvipanda@gmail.com>

MODIFY
s2i-builders/venv/Dockerfile.py2
s2i-builders/venv/Dockerfile.py2
-FROM ubuntu:16.10
+FROM ubuntu:17.04
MAINTAINER Yuvi Panda <yuvipanda@gmail.com>

MODIFY
s2i-builders/venv/README.md
s2i-builders/venv/README.md
@@ -5,7 +5,7 @@ This is a builder image for use with [s2i](https://github.com/openshift/source-t
builds a source repository (such as a github repository) into a docker image that is suitable
for use with [JupyterHub](http://github.com/jupyterhub/jupyterhub).
-It is based off Ubuntu 16.10, and uses [virtualenv](https://pypi.python.org/pypi/virtualenv) to
+It is based off Ubuntu 17.04, and uses [virtualenv](https://pypi.python.org/pypi/virtualenv) to
provide a custom python3.5 environment.
It looks for a `requirements.txt` file in the source repository, and installs it into the virtualenv.

Upgrade s2i builders to inherit from Ubuntu 17.04

We'll decide on our upgrade policy very soon!

Fixes #5