Ensure os_project checks the right domain (#2519)

cloud/openstack/os_project.py

@@ -178,7 +178,11 @@ def main():
                     pass
 
         cloud = shade.openstack_cloud(**module.params)
-        project = cloud.get_project(name)
+
+        if domain:
+            project = cloud.get_project(name, domain_id=domain)
+        else:
+            project = cloud.get_project(name)
 
         if module.check_mode:
             module.exit_json(changed=_system_state_change(module, project))