Use branch default name from settings

Author: tobami

codespeed/models.py

@@ -98,7 +98,7 @@ def __unicode__(self):
         else:
             date = self.date.strftime("%h %d, %H:%M")
         string = " - ".join(filter(None, (date, self.commitid, self.tag)))
-        if self.branch.name != "default":
+        if self.branch.name != settings.DEF_BRANCH:
             string += " - " + self.branch.name
         return string