refactor(tofs): move subcomponent definition to defaults.yaml

* Tests fail locally without modifying pillar otherwise
  - `Jinja variable 'dict object' has no attribute 'subcomponent'`

pillar.example

@@ -24,9 +24,6 @@ template:
   {%- endif %}
   config: /etc/template-formula.conf
 
-  subcomponent:
-    config: /etc/template-subcomponent-formula.conf
-
   tofs:
     # The files_switch key serves as a selector for alternative
     # directories under the formula files directory. See TOFS pattern

template/defaults.yaml

@@ -8,6 +8,8 @@ template:
   config: '/etc/template'
   service:
     name: template
+  subcomponent:
+    config: '/etc/template-subcomponent-formula.conf'
   # Just here for testing
   added_in_defaults: defaults_value
   winner: defaults