update tests

Author: Liza K

src/legacy/core_plugins/vis_type_vega/public/__tests__/vega_visualization.js

@@ -73,7 +73,7 @@ describe('VegaVisualizations', () => {
               },
             },
             __LEGACY: {
-              esClient: npStart.plugins.data.__LEGACY.esClient,
+              esClient: npStart.plugins.data.search.__LEGACY.esClient,
             },
           },
         },

src/legacy/ui/public/saved_objects/__tests__/saved_object.js

@@ -111,7 +111,7 @@ describe('Saved Object', function() {
     ngMock.inject(function($window) {
       savedObjectsClientStub = npStart.core.savedObjects.client;
       SavedObject = createSavedObjectClass({ savedObjectsClient: savedObjectsClientStub });
-      esDataStub = npStart.plugins.data.__LEGACY.esClient;
+      esDataStub = npStart.plugins.data.search.__LEGACY.esClient;
       window = $window;
     })
   );