[Compute] nova.conf missing flat_injected and use_ipv6

[Mark Vanderwiel]

Need to allow flat_injected and use_ipv6 in order to make some config_drive environments work.

Defined here:

https://github.com/openstack/nova/blob/7e1153081e55ae1a5dc628e463724be5b504daf4/nova/network/manager.py

and

https://github.com/openstack/nova/blob/126e1c5ae12ffca8ba460c4fe2888eda46c36461/nova/netconf.py

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/99480

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/99480
Committed: https://git.openstack.org/cgit/stackforge/cookbook-openstack-compute/commit/?id=a5bc9a48deef974fd616f88a142ea992f7cb41f2
Submitter: Jenkins
Branch: master

commit a5bc9a48deef974fd616f88a142ea992f7cb41f2
Author: Mark Vanderwiel <email address hidden>
Date: Wed Jun 11 15:56:14 2014 -0500

    Allow flat_injected and use_ipv6 overrides

    These are useful when trying to use config_drive

    Change-Id: Ib7a554327a68c5a967c021835156d92d33c3b7fd
    Closes-Bug: #1329035