MAGETWO-28256: Bundle Integration API Refactoring

    - Fix failed unit test

Author: Yu Tang

app/code/Magento/Bundle/Test/Unit/Model/Product/LinksListTest.php

@@ -111,7 +111,7 @@ public function testLinksList()
             ->with($linkMock, ['some data'], '\Magento\Bundle\Api\Data\LinkInterface')->willReturnSelf();
         $linkMock->expects($this->once())->method('setIsDefault')->with(true)->willReturnSelf();
         $linkMock->expects($this->once())->method('setQty')->with(66)->willReturnSelf();
-        $linkMock->expects($this->once())->method('setIsDefined')->with(22)->willReturnSelf();
+        $linkMock->expects($this->once())->method('setCanChangeQuantity')->with(22)->willReturnSelf();
         $linkMock->expects($this->once())->method('setPrice')->with(12)->willReturnSelf();
         $linkMock->expects($this->once())->method('setId')->with($selectionId)->willReturnSelf();
         $linkMock->expects($this->once())