nova's kind of awesome, no config changes needed for upgrade

remove the nova config regeneration, not needed at all. Double A
plus, would upgrade again.

Change-Id: Icff946e6f6bd36ce325f647917e81c8329211253
Combine localrc files

Use the Grenade devstack.localrc.* files as the 'default' for DevStack
by pre-pending them to the devstack-vm-gate.sh generated localrc.

devstack.localrc is now appended to the combined DevStack localrc
to still allow it to be the final config.  Normally this will be empty.

Change-Id: I18cb963c4baeeeb447bcb1436521100f1372882a
Merge "Combine localrc files"
Copy current functions from devstack

Change-Id: Ib26d3dae2ab84484aca081a29a9318a4914284f7
Merge "Copy current functions from devstack"