Follow the advice of comment #4, I've tried to make this work by applying this change to the code which belong to the package maas version 1.6.0+bzr2545-0ubuntu1~ppa1.
Follow the advice of comment #4, I've tried to make this work by applying this change to the code which belong to the package maas version 1.6.0+bzr2545- 0ubuntu1~ ppa1.