fix fatal error when exception was thrown

Author: rafal-kos

lib/internal/Magento/Framework/Stdlib/DateTime/Timezone.php

@@ -319,7 +319,7 @@ public function convertConfigTimeToUtc($date, $format = 'Y-m-d H:i:s')
                 throw new LocalizedException(
                     new Phrase(
                         'The DateTime object timezone needs to be the same as the "%1" timezone in config.',
-                        $this->getConfigTimezone()
+                        [$this->getConfigTimezone()]
                     )
                 );
             }

lib/internal/Magento/Framework/Stdlib/Test/Unit/DateTime/TimezoneTest.php

@@ -9,6 +9,7 @@
 
 use Magento\Framework\App\Config\ScopeConfigInterface;
 use Magento\Framework\App\ScopeResolverInterface;
+use Magento\Framework\Exception\LocalizedException;
 use Magento\Framework\Locale\ResolverInterface;
 use Magento\Framework\Stdlib\DateTime;
 use Magento\Framework\Stdlib\DateTime\Timezone;
@@ -208,6 +209,30 @@ public function testDate($expectedResult, $timezone, $date)
         );
     }
 
+    /**
+     * Data provider for testException
+     *
+     * @return array
+     */
+    public function getConvertConfigTimeToUTCDataFixtures()
+    {
+        return [
+            'datetime' => [
+                new \DateTime('2016-10-10 10:00:00', new \DateTimeZone('UTC'))
+            ]
+        ];
+    }
+
+    /**
+     * @dataProvider getConvertConfigTimeToUTCDataFixtures
+     */
+    public function testConvertConfigTimeToUtcException($date)
+    {
+        $this->expectException(LocalizedException::class);
+
+        $this->getTimezone()->convertConfigTimeToUtc($date);
+    }
+
     /**
      * DataProvider for testDate
      *