/usr/lib/python2.7/dist-packages/openstack.compute-2.0a1.egg-info/namespace_packages.txt is in python-openstack-compute 2.0a1-0ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/openstack.compute-2.0a1.egg-info/../../../../share/pyshared/openstack.compute-2.0a1.egg-info/namespace_packages.txt