library/roles/ubuntu-deb-general: Install a couple of python packages needed by some ansible modules.

ubuntu-deb-general/defaults/main.yml

@@ -30,6 +30,12 @@ common_packages:
   - xmlstarlet
   - bsdutils
 
+default_python_packages:
+  - python-software-properties
+  - python-lxml
+  - python-boto
+  
+
 # Set this variable in your playbook
 # additional_packages:
 #   - pkg1

ubuntu-deb-general/tasks/packages.yml

@@ -1,6 +1,7 @@
 ---
 - name: Install the basic packages
-  apt: pkg=python-software-properties state=installed
+  apt: pkg={{ item }} state=installed
+  with_items: '{{ default_python_packages }}'
   tags: packages
 
 - name: Install software-properties-common if needed