dailymotion: Chose a random video to test

Did this mostly because the first video had an issue, it was first
in the search results but deleted (the page was "410 Gone").
But this ends up testing more videos anyway.

modules/dailymotion/test.py

@@ -21,6 +21,8 @@
 from weboob.tools.test import BackendTest
 from weboob.capabilities.video import BaseVideo
 
+from random import choice
+
 
 class DailymotionTest(BackendTest):
     BACKEND = 'dailymotion'
@@ -28,7 +30,7 @@ class DailymotionTest(BackendTest):
     def test_search(self):
         l = list(self.backend.search_videos('chirac'))
         self.assertTrue(len(l) > 0)
-        v = l[0]
+        v = choice(l)
         self.backend.fillobj(v, ('url',))
         self.assertTrue(v.url and v.url.startswith('http://'), 'URL for video "%s" not found: %s' % (v.id, v.url))
         self.backend.browser.openurl(v.url)
@@ -36,6 +38,6 @@ class DailymotionTest(BackendTest):
     def test_latest(self):
         l = list(self.backend.iter_resources([BaseVideo], [u'latest']))
         assert len(l)
-        v = l[0]
+        v = choice(l)
         self.backend.fillobj(v, ('url',))
         self.assertTrue(v.url and v.url.startswith('http://'), 'URL for video "%s" not found: %s' % (v.id, v.url))