Debian specifics for Glance

This patch adds Debian specifics for Glance, and removes
the parts which aren't needed for Debian (since the
configuration is automated in Debian).

Note that this is a break-down of:
https://review.openstack.org/54394/

into smaller patches.

backport: havana

Change-Id: I72c6f1958c292d86cd328a186d717d7022be59a2
(cherry picked from commit c7b575c08aabf4e15e5c6be18c87ff728edb1e4f)
Spefics for Debian in heat

The patch removes unecessary steps durring the installation
process for the Debian manual (these are automated in the
Debian packages).

Change-Id: I1eb8335c75b62aa58976ce78e66d04c5c34f8461
backport:havana
(cherry picked from commit b3c2f5ceb6755d6b43029601f91d6e93790de0dc)
Merge "Spefics for Debian in heat" into stable/havana
Merge "Debian specifics for Glance" into stable/havana