[vevo] Correct test value

The date is now interpreted as UTC for consistency.

youtube_dl/extractor/vevo.py

@@ -57,7 +57,7 @@ class VevoIE(InfoExtractor):
             'age_limit': 18,
             'title': 'Tunnel Vision (Explicit)',
             'uploader': 'Justin Timberlake',
-            'upload_date': '20130704',
+            'upload_date': '20130703',
         },
         'params': {
             'skip_download': 'true',