Add new users to a group with the same name.

src/modules/users/CreateUserJob.cpp

@@ -130,8 +130,7 @@ CreateUserJob::exec()
                               "-m",
                               "-s",
                               "/bin/bash",
-                              "-g",
+                              "-U",
-                              "users",
                               "-G",
                               defaultGroups,
                               m_userName } );