Code review comment for lp://staging/~jimbaker/pyjuju/env-origin

[18]

345 + " *** 0.5+bzr366-1juju1~natty1 0\n"
346 + " 500 http://ppa.launchpad.net/juju/pkgs/ubuntu/ "
347 + "natty/main amd64 Packages\n"
348 + " *** 0.5+bzr356-1juju1~natty1 0\n"
349 + " 500 http://ppa.launchpad.net/juju/pkgs/ubuntu/ "

Your multiple versions test has the PPA both in the installed and in the
non-installed version, so it's not really verifying the bug that you have
just fixed.

Change the URL in the non-installed version in this test so it doesn't come
from the PPA so that we ensure that it's really testing the installed version.
Also add a non-installed version that comes from the ppa in the distro test,
to ensure it's not being considered.

Please ensure tests pass with this and that a real interaction passes as well
before merging.