Enable Angular Image panel

This patch enables the Angular Image panel and deprecates the Django-based
Image panel.

It changes the Django configuration switch and the integration test switch.

Change-Id: I5a8b188985a28c246160210e0c87122519339c64
Partially-Implements: blueprint angularize-images-table

doc/source/topics/settings.rst

@@ -432,7 +432,7 @@ This example sorts flavors by vcpus in descending order::
 Default::
 
   {
-    'images_panel': False
+    'images_panel': True
   }
 
 A dictionary of currently available AngularJS features. This allows simple

openstack_dashboard/settings.py

@@ -299,7 +299,7 @@ COMPRESS_OFFLINE_CONTEXT = 'horizon.themes.offline_context'
 
 # Dictionary of currently available angular features
 ANGULAR_FEATURES = {
-    'images_panel': False,
+    'images_panel': True,
 }
 
 # Notice all customizable configurations should be above this line

openstack_dashboard/test/integration_tests/horizon.conf

@@ -35,7 +35,7 @@ maximize_browser=yes
 
 [image]
 # http accessible image (string value)
-panel_type=legacy
+panel_type=angular
 http_image=http://download.cirros-cloud.net/0.3.1/cirros-0.3.1-x86_64-uec.tar.gz
 images_list=cirros-0.3.4-x86_64-uec,
             cirros-0.3.4-x86_64-uec-kernel,