vm: allow repetition of characters in generated passwords

slapos/recipe/__init__.py

@@ -13,7 +13,8 @@ from zc.buildout.rmtree import rmtree as buildout_rmtree
 def generatePassword(length=8):
   from random import SystemRandom
   from string import ascii_lowercase
-  return ''.join(SystemRandom().sample(ascii_lowercase, length))
+  choice = SystemRandom().choice
+  return ''.join(choice(ascii_lowercase) for _ in range(length))
 
 def is_true(value, default=False):
   return default if value is None else ('false', 'true').index(value)