Add python2.6 dep to aws and cloudstack doc fragments

lib/ansible/utils/module_docs_fragments/aws.py

@@ -62,6 +62,7 @@ options:
     aliases: []
     version_added: "1.6"
 requirements:
+  - "python >= 2.6"
   - boto
 notes:
   - If parameters are not set within the module, the following

lib/ansible/utils/module_docs_fragments/cloudstack.py

@@ -47,6 +47,7 @@ options:
     default: 'get'
     aliases: []
 requirements:
+  - "python >= 2.6"
   - cs
 notes:
   - Ansible uses the C(cs) library's configuration method if credentials are not