fixes 168. openstack cloud-config error

Change-Id: I8879218073c29088f08106bc280656a380275aef
Signed-off-by: tierno <alfonso.tiernosepulveda@telefonica.com>
diff --git a/vimconn_openstack.py b/vimconn_openstack.py
index eaeae92..61d4b43 100644
--- a/vimconn_openstack.py
+++ b/vimconn_openstack.py
@@ -761,7 +761,7 @@
                         userdata_dict["ssh-authorized-keys"] = cloud_config["key-pairs"]
                         userdata_dict["users"] = [{"default": None, "ssh-authorized-keys": cloud_config["key-pairs"] }]
                     if cloud_config.get("users"):
-                        if "users" not in cloud_config:
+                        if "users" not in userdata_dict:
                             userdata_dict["users"] = [ "default" ]
                         for user in cloud_config["users"]:
                             user_info = {