MAGETWO-37560: Banners are not displayed on Banner Rotator Widget

Author: vpaladiychuk

app/code/Magento/Catalog/Block/Adminhtml/Category/Widget/Chooser.php

@@ -172,6 +172,7 @@ public function getCategoryCollection()
      *
      * @param bool|null $expanded
      * @return string
+     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
      */
     public function getLoadTreeUrl($expanded = null)
     {

app/code/Magento/Widget/Test/Unit/Controller/Adminhtml/Widget/Instance/CategoriesTest.php

@@ -97,7 +97,10 @@ public function testExecute()
             ->willReturnSelf();
         $this->chooser->expects($this->once())->method('toHtml')->willReturn($content);
 
-        $this->layout->expects($this->once())->method('createBlock')->with($this->blockClass)->willReturn($this->chooser);
+        $this->layout->expects($this->once())
+            ->method('createBlock')
+            ->with($this->blockClass)
+            ->willReturn($this->chooser);
 
         $this->resultRaw->expects($this->once())->method('setContents')->with($content)->willReturnSelf();