Bump to JupyterHub 0.7.2, dockerspawner 0.7

Author: jtyberg

Dockerfile.jupyterhub

@@ -1,11 +1,11 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
-FROM jupyterhub/jupyterhub-onbuild:0.7.0
+FROM jupyterhub/jupyterhub-onbuild:0.7.2
 
 # Install dockerspawner and its dependencies
 RUN /opt/conda/bin/pip install \
     oauthenticator==0.5.* \
-    dockerspawner==0.5.*
+    dockerspawner==0.7.*
 
 # install docker on the jupyterhub container
 RUN wget https://get.docker.com -q -O /tmp/getdocker && \