【ut】add UT

Author: songyumeng

test/common/iServer/FieldsFilterSpec.js

@@ -1,5 +1,5 @@
 
-import { FieldsFilter } from '../../../src/common/iServer/FieldsFilter';
+import FieldsFilter from '../../../src/common/iServer/FieldsFilter';
 
 var option = {
   "include": ['f1'],

test/common/iServer/ImageCollectionServiceSpec.js

@@ -1,5 +1,5 @@
 import { ImageRenderingRule } from '../../../src/common/iServer/ImageRenderingRule';
-import { ImageCollectionService } from '../../../src/common/iServer/ImageCollectionService';
+import ImageCollectionService from '../../../src/common/iServer/ImageCollectionService';
 import { FetchRequest } from '../../../src/common/util/FetchRequest';