Fix kube-controller-manager failing to start because "Jinja variable 'cloud_config' is undefined"

Fixes the following issue with deployment (which looks like it was introduced by #3068):

----------
          ID: /etc/default/kube-controller-manager
    Function: file.managed
      Result: False
     Comment: Unable to manage file: Jinja variable 'cloud_config' is undefined; line 49
              
              ---
              [...]
                {% set machines = "-machines=$(echo ${MACHINE_IPS[@]} | xargs -n1 echo | paste -sd,)" -%}
                {% set minion_regexp = "" -%}
              {% endif -%}
              {% endif -%}
              
              DAEMON_ARGS="{{daemon_args}} {{master}} {{machines}} {{ minion_regexp }} {{ cloud_provider }} {{ cloud_config }} {{pillar['log_level']}}"    <======================
              ---
     Changes:   

...
     ----------
               ID: kube-controller-manager
         Function: service.running
           Result: False
          Comment: One or more requisite failed
          Changes: