MQE-1963: Update XSD Schema to verify that file has only single entity

Author: jilu1

src/Magento/FunctionalTestingFramework/Upgrade/RemoveModuleFileInSuiteFiles.php

@@ -27,7 +27,7 @@ class RemoveModuleFileInSuiteFiles implements UpgradeInterface
     /**
      * Number of test being updated
      *
-     * @var int
+     * @var integer
      */
     private $testsUpdated = 0;
 
@@ -63,8 +63,8 @@ public function execute(InputInterface $input, OutputInterface $output)
     /**
      * Remove module file attribute in Suite xml file
      *
-     * @param $contents
-     * @param $file
+     * @param string $contents
+     * @param string $file
      * @return string|string[]|null
      */
     private function removeModuleFileAttributeInSuite($contents, $file)