MC-4524: Convert DeleteChildConfigurableProductTest to MFTF

- Add timeout to element to increase robustness

Author: tomreece

app/code/Magento/Catalog/Test/Mftf/Section/StorefrontHeaderSection.xml

@@ -9,6 +9,6 @@
 <sections xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xsi:noNamespaceSchemaLocation="urn:magento:mftf:Page/etc/SectionObject.xsd">
     <section name="StorefrontHeaderSection">
-        <element name="NavigationCategoryByName" type="button" selector="//nav//a[span[contains(., '{{var1}}')]]" parameterized="true"/>
+        <element name="NavigationCategoryByName" type="button" selector="//nav//a[span[contains(., '{{var1}}')]]" parameterized="true" timeout="30"/>
     </section>
 </sections>