/usr/share/doc/python-maas-provisioningserver/changelog.Debian.gz is in python-maas-provisioningserver 1.5+bzr2252-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/python-maas-provisioningserver/../python-maas-client/changelog.Debian.gz