Fix the apt task.

ubuntu-python-setup/tasks/main.yml

@@ -12,8 +12,7 @@
       when: python_pip_fixer is changed
 
     - name: Install the python dev headers and other dev requirements
-      apt: pkg={{ item }} state={{ python_pkgs_state }} update_cache=yes cache_valid_time=1800
-      with_items: '{{ python_pip_dev_packages }}'
+      apt: pkg={{ python_pip_dev_packages }} state={{ python_pkgs_state }} update_cache=yes cache_valid_time=1800
 
     - name: Install a specific version of tornado to avoid breaking dependencies
       pip: name=tornado version=4.1 state=present
@@ -25,8 +24,7 @@
       pip: name=setuptools version=33.1.1 state=present
 
     - name: Fix the ssl warnings installing some ssl libraries
-      pip: name={{ item }} state={{ python_pkgs_state }}
-      with_items: '{{ python_pip_fix_ssl_warnings | default ([]) }}'
+      pip: name={{ python_pip_fix_ssl_warnings | default ([]) }} state={{ python_pkgs_state }}
       register: python_pip_env_workaround
 
   when: is_trusty