Use horizon native wsgi app

The only difference between our and native wsgi app
were adding extra path [1] to sys.path.
However, nowadays this path is already part of syspath

[1] /openstack/venvs/horizon-20.1.1.dev7/lib/python3.6

Change-Id: I90a502fbdeb0040832b66e9df389ab3517b951f4

defaults/main.yml

@@ -149,7 +149,7 @@ horizon_help_url: https://docs.openstack.org/horizon/latest/user/
 
 ## Installation directories
 horizon_lib_dir: "{{ _horizon_lib_dir }}"
-horizon_lib_wsgi_file: "{{ horizon_lib_dir }}/openstack_dashboard/wsgi/django.wsgi"
+horizon_lib_wsgi_file: "{{ horizon_lib_dir }}/openstack_dashboard/wsgi.py"
 
 horizon_endpoint_type: internalURL
 

tasks/horizon_post_install.yml

@@ -59,16 +59,6 @@
   with_items:
     - { src: "/etc/horizon/local_settings.py", dest: "{{ horizon_lib_dir }}/openstack_dashboard/local/local_settings.py" }
 
-- name: Setup Horizon config(s)
-  template:
-    src: "{{ item.src }}"
-    dest: "{{ item.dest }}"
-    owner: "{{ horizon_system_user_name }}"
-    group: "{{ horizon_system_group_name }}"
-  with_items:
-    - { src: "horizon_django.wsgi.j2", dest: "{{ horizon_lib_wsgi_file }}" }
-  notify: Restart apache2
-
 - name: Create customization module directory
   file:
     path: "{{ horizon_lib_dir }}/horizon_customization"

templates/horizon_django.wsgi.j2

@@ -1,14 +0,0 @@
-import logging
-import os
-import sys
-from django.core.wsgi import get_wsgi_application
-from django.conf import settings
-
-# Add this file path to sys.path in order to import settings
-sys.path.insert(0, os.path.normpath(os.path.join(os.path.dirname(os.path.realpath(__file__)), '../..')))
-os.environ['DJANGO_SETTINGS_MODULE'] = 'openstack_dashboard.settings'
-sys.stdout = sys.stderr
-
-DEBUG = False
-
-application = get_wsgi_application()