Use correct variable names

vars/Fedora-21-default.yml

@@ -0,0 +1,12 @@
+---
+# vars file for ensure_cockpit
+package_list:
+  - name: 'cockpit'
+    state: 'present'
+  - name: 'cockpit-doc'
+    state: 'present'
+service_list:
+  - name: 'cockpit.socket'
+    state: 'started'
+    enabled: 'yes'
+