Add a remote fileserver to the inventory so that content can be uploaded
in subsequent tasks or roles.

**Role Variables**

.. zuul:rolevar:: fileserver

  Complex argument which contains the information about the remote
  destination as well as the authentication information needed. It is
  expected that this argument comes from a `Secret`.

  .. zuul:rolevar:: fqdn

    The FQDN of the remote host.

  .. zuul:rolevar:: path

    The remote path. Content will be put into a directory below this path
    that matches ``zuul.project.short_name``. The full path including
    the project short name will be added to the hostvars of the host
    as ``zuul_fileserver_project_path``.

  .. zuul:rolevar:: fileserver_leading_path

    This is an optional variable that will be inserted between the base
    of the path (provided by the `path` variable) and the
    ``zuul.project.short_name`` final path element.

  .. zuul:rolevar:: ssh_known_hosts

    String containing known host signature for the remote host.

  .. zuul:rolevar:: ssh_private_key

    Contents of the ssh private key to use.

  .. zuul:rolevar:: ssh_username
     :default: ansible_user

    Remote ssh user name to use.