Update init user reset password, and clean code

seahub/settings.py

@@ -4,8 +4,6 @@
 import sys
 import os
 import re
-import random
-import string
 
 from seaserv import FILE_SERVER_ROOT, FILE_SERVER_PORT, SERVICE_URL
 
@@ -353,8 +351,8 @@ REQUIRE_DETAIL_ON_REGISTRATION = False
 # Account initial password, for password resetting.
 # INIT_PASSWD can either be a string, or a function (function has to be set without the brackets)
 def genpassword():
-    return ''.join([random.choice(string.digits + string.letters) for i in range(0, 10)])
-
+    from django.utils.crypto import get_random_string
+    return get_random_string(10)
 INIT_PASSWD = genpassword
 
 # browser tab title