playbook: Fix Fluentd request

Replaced 'computer_name' with 'computer_id'. Previously I confused both.
Now the user has to enter the respective computer reference.

playbook/roles/fluentd/templates/request-fluentd.j2

 # Constants
 fluentd_software_release_uri = product.fluentd
-computer_name = "{{computer_name}}"
+computer_id = "{{computer_id}}"
 fluentd_software_name = "{{fluentd_software_name}}"
 fluentd_config = """{{fluentd_config}}"""
 
 # Supplying and requesting
-supply(fluentd_software_release_uri, computer_name)
+supply(fluentd_software_release_uri, computer_id)
 request(
     fluentd_software_release_uri,
     fluentd_software_name,
-    filter_kw={"computer_guid": computer_name},
+    filter_kw={"computer_guid": computer_id},
     partition_parameter_kw={"conf_text": fluentd_config},
 )

playbook/wendelin-olimex-base.yml

@@ -6,6 +6,13 @@
   hosts: 127.0.0.1
   connection: local
 
+  pre_tasks:
+    - pause:
+        prompt: "What is the reference of your computer (COMP-XXXX)?"
+      register: prompt
+    - set_fact:
+        computer_id: "{{ prompt.user_input }}"
+
   tasks:
     - name: Check if client configuration exists already
       stat: path=/root/.slapos/slapos-client.cfg