tests: Trick the last_updated timestamp to be different on mysql

MySQL only has second granularity in its time field. So sorting by last_updated didn't work. Ooops. Yes, this is quite ugly.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>

patchwork/tests/test_rest.py

@@ -24,6 +24,7 @@
 import hashlib
 import json
 import re
+import time
 
 from django.core import mail
 
@@ -101,6 +102,7 @@ def setUp(self):
 
         # a second series so we can test ordering/filtering
         test_series = TestSeries(3, project=self.project)
+        time.sleep(1)
         test_series.insert()
         self.series2 = Series.objects.all().order_by('submitted')[1]
 
@@ -110,6 +112,7 @@ def setUp(self):
         # no cover letter
         test_series = TestSeries(3, project=self.project,
                                  sender=series3_sender, has_cover_letter=False)
+        time.sleep(1)
         test_series.insert()
         self.series3 = Series.objects.all().order_by('submitted')[2]