The service name for the Spice proxy is nova-spiceproxy under Ubuntu.

Change-Id: I061be3d45ef463e9c192d6aea9b9059359c4214c
Update [glance] section in nova.conf for Juno

Use new parameters for Juno like it's documented here:
http://docs.openstack.org/trunk/config-reference/content/nova-conf-changes-master.html
* Use [glance] section
* Delete the glance_ prefix when needed

Closes-bug #1391099

Change-Id: Id6619de87e27b5b476a3bf78387db6c1f52ea4ac
add a dhcp_domain option in nova configuration

Change-Id: I0702d4f7e1a8ca2efdd00a04dc21d52e9064d150
Merge "The service name for the Spice proxy is nova-spiceproxy under Ubuntu."
Merge "add a dhcp_domain option in nova configuration"
Merge "Update [glance] section in nova.conf for Juno"