ACP2E-2549: regenerate product url rewrites when root category is switched and on default is not visible.

Author: alzota

app/code/Magento/CatalogUrlRewrite/Test/Unit/Model/ProductUrlRewriteGeneratorTest.php

@@ -170,7 +170,7 @@ public function testGenerateForDefaultNonVisible()
         $productMock->expects($this->once())
             ->method('getVisibility')
             ->willReturn(Product\Visibility::VISIBILITY_NOT_VISIBLE);
-        $productMock->expects($this->exactly(2))
+        $productMock->expects($this->exactly(3))
             ->method('getStoreId')
             ->willReturn($storeId);
         $productCategoriesMock = $this->getMockBuilder(Collection::class)