install the virtualenv package with pip because the apt version is old and conflicts with the recent version of pip we're using

ansible/roles/brozzler-worker/tasks/main.yml

@@ -9,7 +9,6 @@
   become: true
   apt: name={{item}} state=present
   with_items:
-  - python-virtualenv
   - vnc4server
   - chromium-browser
   - xfonts-base

ansible/roles/common/tasks/main.yml

@@ -19,6 +19,10 @@
   command: python3 setup.py install chdir=/tmp/pip-8.1.2
            creates=/usr/local/lib/python2.7/dist-packages/pip-8.1.2-py2.7.egg/pip/__init__.py
   become: true
+- name: run "pip install virtualenv"
+  command: pip install virtualenv
+           creates=/usr/local/lib/python3.4/dist-packages/virtualenv.py
+  become: true
 - command: id {{user}}
   register: id_user
   ignore_errors: true

ansible/roles/warcprox/tasks/main.yml

@@ -4,7 +4,6 @@
   apt: name={{item}} state=present
   with_items:
   - gcc
-  - python-virtualenv
   - python3.4
   - libpython3.4-dev
   - libffi-dev