Places test variables inside vars/test.yml

All variables inside the playbook's `vars:` where
being overwritten by those on `defaults/main.yml`

test.yml

@@ -1,16 +1,8 @@
 - hosts: all
   vars_files:
-    - 'defaults/main.yml'
-  vars:
-    postgresql_databases:
-      - name: foobar
-    postgresql_users:
-      - name: baz
-        pass: pass
-    postgresql_user_privileges:
-      - name: baz
-        db: foobar
+    - defaults/main.yml
+    - vars/test.yml
   tasks:
-    - include: 'tasks/main.yml'
+    - include: tasks/main.yml
   handlers:
-    - include: 'handlers/main.yml'
+    - include: handlers/main.yml

vars/test.yml

@@ -0,0 +1,10 @@
+---
+blah: one
+postgresql_databases:
+  - name: foobar
+postgresql_users:
+  - name: baz
+    pass: pass
+postgresql_user_privileges:
+  - name: baz
+    db: foobar