openstack: build icehouse by default

Change Havana to Icehouse by default.

Signed-off-by: Emilien Macchi <emilien.macchi@enovance.com>
openstack-full: add ceilometer-agent-notification package

ceilometer-agent-notification is a new package in Debian/Ubuntu.

Signed-off-by: Emilien Macchi <emilien.macchi@enovance.com>
Makefile: icehouse 1.0.0
Merge pull request #45 from enovance/icehouse-dev

Icehouse release