Makes installation of Ansible optional (default: no) and installs additional python libraries

defaults/main.yml

@@ -1,7 +1,7 @@
 ---
 # defaults file for common
-hostname: '{{ inventory_hostname }}'
-update_hostname: yes
+hostname: "{{ inventory_hostname }}"
+update_hostname: no
 locales_gen:
   - en_US.UTF-8
   - de_DE.UTF-8
@@ -11,6 +11,10 @@ users:
   - vagrant
 sudoers:
   - vagrant
+enable_ansible: no
+# Will install a specific Ansible version on the target host
 ensure_ansible_version: 2.10.3
+# Allow sudo with a password (applied to group sudo)
 enable_sudo: yes
+# Allow passwordless sudo (applied to group wheel)
 enable_passwordless_sudo: yes