MQE-231: Allow data to extend other data

- Added support to overwrite parent type or take parent type if null

Author: aljcalandra

dev/tests/verification/TestModule/Data/ExtendedData.xml

@@ -13,7 +13,7 @@
         <data key="uniqueNamePre" unique="prefix">prename</data>
         <data key="uniqueNamePost" unique="suffix">postname</data>
     </entity>
-    <entity name="extendParentData" type="extendParentData" extends="parentData">
+    <entity name="extendParentData" extends="parentData">
         <data key="name">otherName</data>
         <data key="nameExtend">extendName</data>
         <data key="uniqueNamePost">item</data>

src/Magento/FunctionalTestingFramework/DataGenerator/Util/DataExtensionUtil.php

@@ -56,6 +56,9 @@ public function extendEntity($entityObject)
             echo("Extending Data: " . $parentEntity->getName() . " => " . $entityObject->getName() . PHP_EOL);
         }
 
+        //get parent entity type if child does not have a type
+        $newType = $entityObject->getType() ?? $parentEntity->getType();
+
         // Get all data for both parent and child and merge
         $referencedData = $parentEntity->getAllData();
         $newData = array_merge($referencedData, $entityObject->getAllData());
@@ -84,7 +87,7 @@ public function extendEntity($entityObject)
         // Create new Test object to return
         $extendedEntity = new EntityDataObject(
             $entityObject->getName(),
-            $parentEntity->getType(),
+            $newType,
             $newData,
             $newLinkedReferences,
             $newUniqueReferences,