Emergency reversion of python docker file

Python action taking so long that builds are timing out including Travis where it times out from global timeout which is out of our control.

core/pythonAction/Dockerfile

@@ -3,17 +3,18 @@ FROM ubuntu:14.04
 
 ENV DEBIAN_FRONTEND noninteractive
 
-# Upgrade and install Python and helpers
-RUN apt-get -y purge && \
-    apt-get -y update && \
-    apt-get -y install --fix-missing python2.7 && \
-    apt-get -y install --fix-missing python2.7-dev && \
-    apt-get -y install --fix-missing python-distribute && \
-    apt-get -y install --fix-missing python-pip && \
-    apt-get clean && \
-    pip install -U flask && \
-    pip install -U gevent
+# Upgrade and install python
+RUN apt-get -y purge
+RUN apt-get -y update
+RUN apt-get -y install --fix-missing python2.7
+RUN apt-get -y install --fix-missing python2.7-dev
+RUN apt-get clean
 
+# Install Python CGI helpers.
+RUN apt-get -y install --fix-missing python-distribute python-pip
+RUN pip install -U flask
+RUN pip install -U gevent
+ 
 ENV FLASK_PROXY_PORT 8080
 
 RUN mkdir -p /pythonAction