Endpoints admin

Provides admin endpoint management.

Usually the minimum recommended number of networks is 2.
Although 1 could work, most production environments use 2 or even 3 networks.
The 3 typical network being "public", "admin" and "private".
When only 2 networks are used it usually means the "admin" network is co-mingled with either of the other two.
In which case the "admin" endpoints to follow suit.

If merged, RDO wiki page http://openstack.redhat.com/Deploying_RDO_Using_Foreman
- Need to be updated with example "export ADMIN_CONTROLLER_IP=192.168.202.10" 
- Add above explanation or equivalent.

Also  changed nova_network/compute.pp to use public floating instead of private (like neutron compute).
Otherwise the novnc console won't work through Horizon from outside.