Fix undefined ansible_pkg_mgr (#18)

Fix undefined ansible_pkg_mgr

Author: anders-elastisys

images/capi/ansible/roles/sysprep/tasks/debian.yml

@@ -18,11 +18,11 @@
     machine_id_mode: "0644"
 
 # This is required to ensure any apt upgrade will not break kubernetes
-- name: Tell Debian hosts not to change the kuberetes versions with apt upgrade
+- name: Tell Debian hosts not to change the Kubernetes versions with apt upgrade
   dpkg_selections:
     name: "{{ item }}"
     selection: hold
-  when: ansible_pkg_mgr == 'apt'
+  when: ansible_facts['pkg_mgr'] == 'apt'
   changed_when: false
   with_items:
     - kubelet