test(libtofs): “tofs.files_switch” lookup can return a list

We need to verify that “libtofs” works when the “tofs.files_switch”
lookup return a list instead of a single element.

* kitchen.yml (provisioner): copy tests specific pillars into the test
  environment.

* pillar.example (template.tofs.files_switch): lookup for “roles” at
  the end.

* test/salt/pillar/test.sls (roles): list of roles to apply during
  tests.

* test/integration/default/controls/config_spec.rb: add “roles” to the
  list of “tofs.files_switch” items to verify.

kitchen.yml

@@ -124,8 +124,10 @@ provisioner:
       base:
         '*':
           - template
+          - define_roles
   pillars_from_files:
     template.sls: pillar.example
+    define_roles.sls: test/salt/pillar/define_roles.sls
 
 verifier:
   # https://www.inspec.io/

pillar.example

@@ -33,6 +33,7 @@ template:
     files_switch:
       - any/path/can/be/used/here
       - id
+      - roles
       - osfinger
       - os
       - os_family

test/integration/default/controls/config_spec.rb

@@ -14,7 +14,7 @@ control 'template configuration' do
     its('content') { should include '"lookup": {"added_in_lookup": "lookup_value",' }
     its('content') { should include '"pkg": {"name": "' }
     its('content') { should include '"service": {"name": "' }
-    its('content') { should include '"tofs": {"files_switch": ["any/path/can/be/used/here", "id", "osfinger", "os", "os_family"], "source_files": {"template-config-file-file-managed": ["example.tmpl.jinja"]}' }
+    its('content') { should include '"tofs": {"files_switch": ["any/path/can/be/used/here", "id", "roles", "osfinger", "os", "os_family"], "source_files": {"template-config-file-file-managed": ["example.tmpl.jinja"]}' }
     its('content') { should include '"winner": "pillar"}' }
     its('content') { should include 'winner of the merge: pillar' }
   end

test/salt/pillar/define_roles.sls

@@ -0,0 +1,4 @@
+# libtofs.jinja must work with tofs.files_switch looked up list
+roles:
+  - foo
+  - bar