Chunk this so we get /edx/etc/app.yml only

Before we would get /edx/etc/app and /edx/etc/app.yml
and it doesn't seem worth moving those around.

playbooks/roles/edx_service/tasks/main.yml

@@ -59,16 +59,24 @@
     - install
     - install:base
 
-- name: Create /edx/var and /edx/etc dirs
+- name: Create /edx/var/app dir
   file:
-    path: "{{ item }}/{{ edx_service_name }}"
+    path: "/edx/var/{{ edx_service_name }}"
+    state: directory
+    owner: "{{ edx_service_user }}"
+    group: "{{ common_web_group }}"
+    mode: "0755"
+  tags:
+    - install
+    - install:base
+
+- name: Create /edx/etc dir
+  file:
+    path: "/edx/etc"
     state: directory
     owner: "{{ edx_service_user }}"
     group: "{{ common_web_group }}"
     mode: "0755"
-  with_items:
-    - "/edx/var"
-    - "/edx/etc"
   tags:
     - install
     - install:base