Comment 14 for bug 1609733

I added string
deb http://archive.ubuntu.com/ubuntu/ xenial-proposed restricted main multiverse universe
to sources.list
and I can't find new python-glance-store in:
ubuntu@ip-172-31-4-31:~$ apt-cache policy python-glance-store
python-glance-store:
  Installed: 0.13.0-3~cloud0
  Candidate: 0.13.0-3~cloud0
  Version table:
 *** 0.13.0-3~cloud0 0
        500 http://ubuntu-cloud.archive.canonical.com/ubuntu/ trusty-updates/mitaka/main amd64 Packages
        100 /var/lib/dpkg/status

But new cinder package present there:
ubuntu@ip-172-31-4-31:~$ apt-cache policy python-cinder
python-cinder:
  Installed: (none)
  Candidate: 2:8.1.0-0ubuntu1
  Version table:
     2:8.1.0-0ubuntu1 0
        500 http://archive.ubuntu.com/ubuntu/ xenial-proposed/main amd64 Packages

where am I wrong? How I can help to verify this bug?