Add Nova Admin access to neutron.conf

Add Nova admin access information to Neutron to allow it to do
vif callbacks.

Change-Id: I1889662f74a8da8c4ccfc46f0ccf8e73e9acb74b
Closes-Bug: #1293782
Remove all first-boot.d references

first-boot.d has been deprecated for two releases so is about
time to remove any references to it.

Change-Id: Id8415447592be9fb3fd009dc528aed3c42b6095d
Make haproxy timeout configurable

We are hitting haproxy server timeouts sometimes so making
these values configurable so that we can tune them via heat.

Change-Id: I83d219e076229fe58eec13ad99432c4770accc8d
Default to the "scale" deployment mode

Defaulting to "poc" means that we by default use a mode with less features,
which means people wonder where that feature has gone.

Change-Id: I6a29c8dfcc5d176c3ccbd4ff0945e3b9568fb0d1
Merge "Remove all first-boot.d references"
Merge "Default to the "scale" deployment mode"
Merge "Add Nova Admin access to neutron.conf"
Merge "Make haproxy timeout configurable"