Fix a bug about "openstack server list --user"

Fix the bug to get the right user id.

Change-Id: Ie60a719a40654802772884ff94271b37aa061ac3
Closes-Bug: #1513701

Author: simenhhu

openstackclient/compute/v2/server.py

@@ -735,7 +735,7 @@ def take_action(self, parsed_args):
 
         user_id = None
         if parsed_args.user:
-            user_id = identity_common.find_project(
+            user_id = identity_common.find_user(
                 identity_client,
                 parsed_args.user,
                 parsed_args.user_domain,