MAGETWO-91529: Restricted admin user can remove product from other websites

- Fix unit test failures

Author: Joan He

app/code/Magento/ConfigurableProduct/Test/Unit/Ui/DataProvider/Product/Form/Modifier/CustomOptionsTest.php

@@ -10,6 +10,14 @@
 
 class CustomOptionsTest extends AbstractModifierTest
 {
+    protected function setUp()
+    {
+        parent::setUp();
+        $this->arrayManagerMock->expects($this->any())
+            ->method('merge')
+            ->willReturnArgument(1);
+    }
+
     /**
      * {@inheritdoc}
      */