Correct local_settings example from overwriting settings

Currently, local_settings.py.example redefines HORIZON_CONFIG
(previously defined in settings.py). This adds to confusion as to
where proper definitions and modifications should be made.
This change ensures that only modifications of HORIZON_CONFIG
are made within local_settings.py.example and defining of
HORIZON_CONFIG is left in settings.py.

-added importing of HORIZON_CONFIG from settings

-corrected portion that was redefining HORIZON_CONFIG

-left the modal_backdrop = static change that was
occuring in the redefition in local_settings to
that of a modification and commented out to serve
as an example (conforms to usual pattern)

-migrated the default for 'modal_backdrop'
into settings.py

Change-Id: I7ddeee82258f6c871ff77e1bc03115c2adbf618e
Closes-Bug: #1472687

openstack_dashboard/local/local_settings.py.example

@@ -3,6 +3,7 @@ import os
 from django.utils.translation import ugettext_lazy as _
 
 from openstack_dashboard import exceptions
+from openstack_dashboard.settings import HORIZON_CONFIG
 
 DEBUG = True
 TEMPLATE_DEBUG = DEBUG
@@ -65,24 +66,9 @@ WEBROOT = '/'
 # Set to None explicitly if you want to deactivate the console.
 #CONSOLE_TYPE = "AUTO"
 
-# Default OpenStack Dashboard configuration.
-HORIZON_CONFIG = {
-    'user_home': 'openstack_dashboard.views.get_user_home',
-    'ajax_queue_limit': 10,
-    'auto_fade_alerts': {
-        'delay': 3000,
-        'fade_duration': 1500,
-        'types': ['alert-success', 'alert-info']
-    },
-    'help_url': "http://docs.openstack.org",
-    'exceptions': {'recoverable': exceptions.RECOVERABLE,
-                   'not_found': exceptions.NOT_FOUND,
-                   'unauthorized': exceptions.UNAUTHORIZED},
-    'modal_backdrop': 'static',
-    'angular_modules': [],
-    'js_files': [],
-    'js_spec_files': [],
-}
+# Show backdrop element outside the modal, do not close the modal
+# after clicking on backdrop.
+#HORIZON_CONFIG["modal_backdrop"] = "static"
 
 # Specify a regular expression to validate user passwords.
 #HORIZON_CONFIG["password_validator"] = {

openstack_dashboard/settings.py

@@ -64,6 +64,7 @@ HORIZON_CONFIG = {
     'exceptions': {'recoverable': exceptions.RECOVERABLE,
                    'not_found': exceptions.NOT_FOUND,
                    'unauthorized': exceptions.UNAUTHORIZED},
+    'modal_backdrop': 'static',
     'angular_modules': [],
     'js_files': [],
     'js_spec_files': [],