Comment 2 for bug 1621065

Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial-updates/InRelease rename failed, Stale file handle (/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_xenial-updates_InRelease -> /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_xenial-updates_InRelease).\nE:

This is an issue with your environment maybe, but not maas or juju. As blake says above, you could try removing the install of python2.7 or do a sudo apt-get update before?