Revert patch causing Instance Image Perf Issue

The previous patch https://review.openstack.org/52115 is causing
image get call for each instance. Reverting this back.

Fix will follow in another patch.

Related to bug: Bug: #1239896

Change-Id: If0d6feba50eb3f45248019fcc48580d1eae60d67

openstack_dashboard/dashboards/project/instances/tests.py

@@ -182,45 +182,6 @@ class InstanceTests(test.TestCase):
         self.assertMessageCount(res, error=len(servers))
         self.assertItemsEqual(instances, self.servers.list())
 
-    @test.create_stubs({api.nova: ('flavor_list',
-                                   'server_list',
-                                   'tenant_absolute_limits',
-                                   'extension_supported',),
-                        api.glance: ('image_list_detailed',),
-                        api.network:
-                            ('floating_ip_simple_associate_supported',),
-                        })
-    def test_index_with_instance_booted_from_volume(self):
-        volume_server = self.servers.first()
-        volume_server.image = ""
-        volume_server.image_name = "(not found)"
-        servers = self.servers.list()
-        servers[0] = volume_server
-
-        api.nova.extension_supported('AdminActions',
-                                     IsA(http.HttpRequest)) \
-            .MultipleTimes().AndReturn(True)
-        api.nova.flavor_list(IsA(http.HttpRequest)) \
-            .AndReturn(self.flavors.list())
-        api.glance.image_list_detailed(IgnoreArg()) \
-            .AndReturn((self.images.list(), False))
-        search_opts = {'marker': None, 'paginate': True}
-        api.nova.server_list(IsA(http.HttpRequest), search_opts=search_opts) \
-            .AndReturn([servers, False])
-        api.nova.tenant_absolute_limits(IsA(http.HttpRequest), reserved=True) \
-           .MultipleTimes().AndReturn(self.limits['absolute'])
-        api.network.floating_ip_simple_associate_supported(
-            IsA(http.HttpRequest)).MultipleTimes().AndReturn(True)
-
-        self.mox.ReplayAll()
-
-        res = self.client.get(INDEX_URL)
-
-        self.assertTemplateUsed(res, 'project/instances/index.html')
-        instances = res.context['instances_table'].data
-        self.assertEqual(len(instances), len(servers))
-        self.assertContains(res, "(not found)")
-
     @test.create_stubs({api.nova: ('server_list',
                                    'flavor_list',
                                    'server_delete',),

openstack_dashboard/dashboards/project/instances/views.py

@@ -89,7 +89,6 @@ class IndexView(tables.DataTableView):
             # Loop through instances to get flavor info.
             for instance in instances:
                 if (hasattr(instance, 'image')
-                        and hasattr(instance.image, 'id')
                         and instance.image['id'] in image_map):
                     instance.image = image_map[instance.image['id']]