Cherry-picked a bugfix from up stream:
 https://github.com/openstack/python-novaclient/commit/5e3a3a193bb55cd9f0622b0adb76ffa54b98b906#diff-8356922bdda4b403f8dd2c1be033a98a
Added support for nova services, and simplified model, dropping the separate classes for them.   May re-add later if needed.
Added availability zones.
Handle situation where no instances are running
Add python-keystoneclient 0.8.0
Add python-keystoneclient 0.8.0
Merge branch 'feature/2.0.0dev' of https://github.com/zenoss/ZenPacks.zenoss.OpenStack into feature/2.0.0dev
Merged
Updated zenpacklib (from feature/info_inheritence for the time being)
Merge branch 'feature/2.0.0dev' of https://github.com/zenoss/ZenPacks.zenoss.OpenStack into feature/2.0.0dev