Export user id as password to keystone when using noauth

Fixes bug #969208

When using noauth, a user's password is her user id (e.g. in novarc).

When we export to keystone, we should make sure the same credentials
keep working rather than effectively switching all the passwords to
random UUIDs which users would never have seen before.

Change-Id: Ie77c622ce1952d03e836bb64167184022a02e902

bin/nova-manage

@@ -1542,16 +1542,23 @@ class ExportCommands(object):
         am = manager.AuthManager()
 
         for user in am.get_users():
+            # NOTE(vish): Deprecated auth uses an access key, no auth uses a
+            #             the user_id in place of it.
+            if FLAGS.auth_strategy == 'deprecated':
+                access = user.access
+            else:
+                access = user.id
+
             user_dict = {
                 'id': user.id,
                 'name': user.name,
-                'password': user.access,
+                'password': access,
             }
             output['users'].append(user_dict)
 
             ec2_cred = {
                 'user_id': user.id,
-                'access_key': user.access,
+                'access_key': access,
                 'secret_key': user.secret,
             }
             output['ec2_credentials'].append(ec2_cred)