Changed the ordering for sudoers where used

The sudoers file was being created in the pre-install tasks
which causes an incorrect configuration variable to be dropped
when the venv env is not turned on. To correct this issue the
sudoers template is now dropped in the post install task file
after the bin_path fact has been set.

This change also removes the directory create task for heat, keystone,
glance, and swift because no sudoers files are needed for these services.

Re-Implementation-Of: https://review.openstack.org/#/c/277674/1
Change-Id: I609c9c12579dc1897787d19a1f58fe3e919b5e35
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>

tasks/nova_post_install.yml

@@ -76,3 +76,14 @@
     - not nova_venv_enabled | bool
   tags:
     - nova-command-bin
+
+- name: Drop sudoers file
+  template:
+    src: "sudoers.j2"
+    dest: "/etc/sudoers.d/{{ nova_system_user_name }}_sudoers"
+    mode: "0440"
+    owner: "root"
+    group: "root"
+  tags:
+    - sudoers
+    - nova-sudoers

tasks/nova_pre_install.yml

@@ -111,17 +111,6 @@
     - nova-dirs
     - nova-logs
 
-- name: Drop sudoers file
-  template:
-    src: "sudoers.j2"
-    dest: "/etc/sudoers.d/{{ nova_system_user_name }}_sudoers"
-    mode: "0440"
-    owner: "root"
-    group: "root"
-  tags:
-    - sudoers
-    - nova-sudoers
-
 - include: nova_messaging_setup.yml
   when: >
     inventory_hostname == groups['nova_all'][0]