nova.local was recently added to openstack-common. Remove nova.local
and use openstack.common.local instead.
One benefit of this change is that it is another step toward decoupling
nova.rpc from the rest of nova.
Change-Id: I0240f4291a81f8390d3f329a11f207a1453d7cab
Use openstack-common's update.py script to pull in some recent changes:
* Add the Mapping interface to cfg.ConfigOpts
* Add support to cfg for disabling interspersed args
Make use of both of these in nova/flags.py.
Add some dire warnings to HACKING about directly modifying the copy of
openstack-common code. I'm confident they won't be ignored :-)
Change-Id: I7ef75d18922c0bbb8844453b48cad0418034bc11