zenoss openstack monitor

http://community.zenoss.org/docs/DOC-11968

1, zenpack --install ZenPacks.zenoss.OpenStack-1.0.2-py2.6.egg zenoss restart 

2, git clone git://github.com/zenoss/ZenPacks.zenoss.OpenStack.git

3, zenpack --link --install ZenPacks.zenoss.OpenStack zenoss restart