Change hashcompat to hashlib to depress warning

thirdpart/registration/models.py

@@ -1,4 +1,5 @@
 import datetime
+import hashlib
 import random
 import re
 
@@ -7,7 +8,6 @@ from django.conf import settings
 from django.db import models
 from django.db import transaction
 from django.template.loader import render_to_string
-from django.utils.hashcompat import sha_constructor
 from django.utils.translation import ugettext_lazy as _
 
 from seahub.base.accounts import User
@@ -110,11 +110,11 @@ class RegistrationManager(models.Manager):
         username and a random salt.
         
         """
-        salt = sha_constructor(str(random.random())).hexdigest()[:5]
+        salt = hashlib.sha1(str(random.random())).hexdigest()[:5]
         username = user.username
         if isinstance(username, unicode):
             username = username.encode('utf-8')
-        activation_key = sha_constructor(salt+username).hexdigest()
+        activation_key = hashlib.sha1(salt+username).hexdigest()
         return self.create(emailuser_id=user.id,
                            activation_key=activation_key)