Ansible-pull support

[eoli3n]

We use ansible-pull on our agents. The tasks "Installing ThinLinc packages" use unarchive module.
Unarchive module defaultly assumes that the archive file is on the controller, but as ansible-pull runs ansible directly from clients, I provide that file directly with NFS on all hosts.
I needed to add remote_src: yes, which let me use ansible-pull and ansible "push" in the same way.
And to configure thinlinc_bundle_path with the full path from clients view.

thinlinc_bundle_path: "/srv/nfs/installers/tl-{{ thinlinc_version }}-server.zip"

- name: Installing ThinLinc packages
  block:
    - name: Unpacking ThinLinc server bundle
      unarchive:
        src: "{{ thinlinc_bundle_path }}"
        dest: /root
        creates: "/root/tl-{{ thinlinc_version }}-server"
        remote_src: yes