ENGCOM-3206: [Backport] Create empty modelData array to avoid undefined var error #18657

 - Merge Pull Request #18657 from gelanivishal/magento2:2.2-develop-PR-port-18529
 - Merged commits:
   1. e6dedb7
   2. c2a2a10
   3. c77ffb8

Author: magento-engcom-team

app/code/Magento/Developer/Console/Command/SourceThemeDeployCommand.php

@@ -5,7 +5,6 @@
  */
 namespace Magento\Developer\Console\Command;
 
-use Magento\Framework\App\State;
 use Magento\Framework\Validator\Locale;
 use Magento\Framework\View\Asset\Repository;
 use Symfony\Component\Console\Command\Command;

app/code/Magento/NewRelicReporting/Model/Cron/ReportModulesInfo.php

@@ -64,6 +64,7 @@ public function report()
             $moduleData = $this->collect->getModuleData();
             if (count($moduleData['changes']) > 0) {
                 foreach ($moduleData['changes'] as $change) {
+                    $modelData = [];
                     switch ($change['type']) {
                         case Config::ENABLED:
                             $modelData = [

app/code/Magento/NewRelicReporting/Model/NewRelicWrapper.php

@@ -31,7 +31,7 @@ public function addCustomParameter($param, $value)
     /**
      * Wrapper for 'newrelic_notice_error' function
      *
-     * @param  Exception $exception
+     * @param  \Exception $exception
      * @return void
      */
     public function reportError($exception)