static, integration test fix

Author: Nazar65

app/code/Magento/Email/Model/Template.php

@@ -418,6 +418,8 @@ public function setOptions(array $options)
     }
 
     /**
+     *  Return filter factory.
+     *
      * @return \Magento\Email\Model\Template\FilterFactory
      */
     protected function getFilterFactory()

dev/tests/integration/testsuite/Magento/Email/Model/TemplateTest.php

@@ -703,8 +703,8 @@ public function testGetVariablesOptionArrayInGroup()
         $testTemplateVariables = '{"var data.name":"Sender Name","var data.email":"Sender Email"}';
         $this->model->setOrigTemplateVariables($testTemplateVariables);
         $variablesOptionArray = $this->model->getVariablesOptionArray(true);
-        $this->assertEquals('Template Variables', $variablesOptionArray['label']->getText());
-        $this->assertEquals($this->model->getVariablesOptionArray(), $variablesOptionArray['value']);
+        $this->assertEquals('Template Variables', $variablesOptionArray[0]['label']->getText());
+        $this->assertEquals($this->model->getVariablesOptionArray(), $variablesOptionArray[0]['value']);
     }
 
     /**