Remove quotas on seed and undercloud's nova

On the seed and undercloud, Nova starts with default quotas, so
limiting the number of instances per tennant to 10.  This makes it
hard to add nodes to test large deployments without manual
intervention.

This patch instructs nova to use unlimited quotas for:
  - cores
  - instances
  - ram

Partial-Bug: #1281702
Co-Author: matthew.gilliard@hp.com
Change-Id: I554536be20970938bcbda20db5d39ba17caed1e7
Merge "Remove quotas on seed and undercloud's nova"