Add Havana, Icehouse, Juno to glossary

Change-Id: I75b25a53c2dfb3d20e6eac73754aa2f692ae7745
Add information about nova-conductor

This commit adds information about nova-conductor to the cloud
controller chapter. It also adds the nova-conductor service to the
output of nova-manage service list.

Change-Id: I8594f305ae565af74f3e4c633cf0ab24e2a6af48
Merge "Add Havana, Icehouse, Juno to glossary"
Merge "Add information about nova-conductor"