config_service: add last import validation and tests

appengine/config_service/ui/src/config-ui/front-page.html

Index: appengine/config_service/ui/src/config-ui/front-page.html
diff --git a/appengine/config_service/ui/src/config-ui/front-page.html b/appengine/config_service/ui/src/config-ui/front-page.html
index 95e70b821e6fce4ed1afcc4101e50d58ded6b169..7d0f7de215b1d26f9efbb3999f8822a9900d6c41 100644
--- a/appengine/config_service/ui/src/config-ui/front-page.html
+++ b/appengine/config_service/ui/src/config-ui/front-page.html
@@ -38,7 +38,7 @@
     <iron-ajax
         auto
         id="requestConfigs"
-        url="/_ah/api/config/v1/config-sets"
+        url="/_ah/api/config/v1/config-sets?include_last_import_attempt=true"
         handle-as="json"
         on-response="_onGotConfigSets">
     </iron-ajax>
@@ -57,7 +57,11 @@
         </template>
         <template is="dom-if" if="[[_not(_isEmpty(searchResults))]]">
           <template is="dom-repeat" items="[[searchResults]]" as="config">
-            <config-set-card name="[[config.config_set]]" on-tap="_handleClick"></config-set-card>
+            <config-set-card 
+                name="[[config.config_set]]" 
+                last-import-attempt="[[config.last_import_attempt.success]]" 
+                on-tap="_handleClick">
+            </config-set-card>
           </template>
         </template>
       </template>