Adds a Hyper-V Quantum plugin

Blueprint quantum-plugin-hyper-v

Initial Hyper-V Quantum plugin including VLAN support.
Support for NVGRE networking will be added in a subsequent patch.
The plugin architecture relies heavily on the OVS plugin, with some
design differences to handle different network types via polymorphism.

The plugin contains two main components:

The plugin itself, to be executed on Linux or Windows
The L2 agent, to be executed on each Hyper-V node

L3 networking is currently handled on Linux with the existing agents.

A Nova Quantum Vif plugin is included in the Nova project.

Change-Id: Ie64bff448e3fb1129c5e24baaf148cdcc0aed8b9
Adds support for deploying Quantum on Windows

Some changes in setup.py are required to properly handle dependencies
and data files on WIndows (including Hyper-V server).

A console script called "quantum-hyperv-agent" has also been added to
start the Hyper-V agent

Change-Id: Ifac2d33afabac242d9dab87b0bc1764421efc16f
Name the securitygrouprules.direction enum.

Updates to the SecurityGroupRule model and migration so that we
explicitly name the securitygrouprules.direction enum. This fixes
'Postgresql ENUM type requires a name.' errors.

Fixes LP Bug #1099267.

Change-Id: Ia46fe8d4b0793caaabbfc71b7fa5f0cbb8c6d24b
Merge "Name the securitygrouprules.direction enum."
Merge "Adds a Hyper-V Quantum plugin"
Merge "Adds support for deploying Quantum on Windows"