Fix glance database configuration setting

Use the non-deprecated setting and use crudini
to actually update the config file.

(cherry picked from commit 89e8bc9935138959fe54814538ee3cff21e1fca0)
Remove nova-volume endpoint registration

We've switched to Cinder ages ago and this endpoint
is just obsolete.
Fix name of cinderv2 service

Duplicate names are not allowed, and this causes tempest
failures. Fix it like devstack did.
Stop setting deprecated config options

(cherry picked from commit 0bfa978e2834cef7f9832112e6a640b3543711b9)
13.2 dropped /etc/init.d/network

thus we use the rcnetwork symlink that is available on all *SUSE versions
Merge branch 'stable/juno'