library/roles/python-env: Fix the python pip setup. Again.

python-env/defaults/main.yml

@@ -11,6 +11,7 @@ py_env_basic_pkgs:
 py_env_pip_dev_packages:
   - libpython-dev
   - libssl-dev
+  - libffi-dev
 
 py_env_pip_fix_ssl_warnings:
   - pyOpenSSL

python-env/tasks/main.yml

@@ -41,13 +41,16 @@
       shell: /usr/local/bin/python-pip-fixer
       when: ( python_pip_fixer | changed )
 
-    - name: Install the python dev headers
+    - name: Install the python dev headers and other dev requirements
       apt: pkg={{ item }} state=present
       with_items: '{{ py_env_pip_dev_packages }}'
 
     - name: Install the latest six python package
       pip: name=six state=latest
 
+    - name: Install setuptools version 33.1.1
+      pip: name=setuptools version=33.1.1 state=present
+
     - name: Fix the ssl warnings installing some ssl libraries
       pip: name={{ item }}
       with_items: '{{ py_env_pip_fix_ssl_warnings | default ([]) }}'