MQE-677: Unable to use integer "0" as data in an entity

- perform expcliity null check on replacement var

Author: imeron2433

dev/tests/verification/Resources/DataReplacementTest.txt

@@ -46,5 +46,6 @@ class DataReplacementTestCest
 		$I->amOnUrl("Doe".msq("uniqueData").".html");
 		$I->searchAndMultiSelectOption("#selector", ["John", "Doe".msq("uniqueData")]);
 		$I->searchAndMultiSelectOption("#selector", [msq("uniqueData")."John", "Doe".msq("uniqueData")]);
+		$I->fillField(".selector", "0");
 	}
 }

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

@@ -13,6 +13,7 @@
         <data key="firstname">John</data>
         <data key="lastname">Doe</data>
         <data key="middlename">Tiberius</data>
+        <data key="favoriteIndex">0</data>
     </entity>
     <entity name="uniqueData" type="simpleData">
         <data key="firstname" unique="prefix">John</data>

dev/tests/verification/TestModule/Test/DataReplacementTest.xml

@@ -30,5 +30,7 @@
         <amOnUrl stepKey="urlReplaceMSQSuffix" url="{{uniqueData.lastname}}.html"/>
         <searchAndMultiSelectOption stepKey="parameterArrayReplacementMSQSuffix" selector="#selector" parameterArray="[{{simpleData.firstname}}, {{uniqueData.lastname}}]"/>
         <searchAndMultiSelectOption stepKey="parameterArrayReplacementMSQBoth" selector="#selector" parameterArray="[{{uniqueData.firstname}}, {{uniqueData.lastname}}]"/>
+
+        <fillField stepKey="insertZero" selector=".selector" userInput="{{simpleData.favoriteIndex}}"/>
     </test>
 </tests>

src/Magento/FunctionalTestingFramework/Test/Objects/ActionObject.php

@@ -312,7 +312,7 @@ private function resolveDataInputReferences()
         foreach ($relevantDataAttributes as $dataAttribute) {
             $varInput = $this->actionAttributes[$dataAttribute];
             $replacement = $this->findAndReplaceReferences(DataObjectHandler::getInstance(), $varInput);
-            if ($replacement) {
+            if ($replacement != null) {
                 $this->resolvedCustomAttributes[$dataAttribute] = $replacement;
             }
         }