Add firewall_driver option to linuxbridge_conf.ini

Fixes bug 1121855

firewall_driver configuration option has been introduced in the patch
of OVS security group support and it affects Linux Bridge plugin.
The default value of firewall_driver is NoopDriver.
Thus firewall_driver configuration is required in Linux Bridge plugin.

Change-Id: I403be91b01eb6fa679dab28cd4995c85d12100b9
L3 API support for nicira plugin

blueprint nvp-l3-api

This patch adds supports the Quantum L3 API extension to the nicira NVP
Quantum Plugin.

The patch includes code for managing Quantum routers, router interfaces,
external gateways, and floating IPs, and for applying the relevant
configurations on the NVP controller using the NVP API.

The patch also includes NVP-specific support for access to the nova
metadata server via injection of a host route in VM instances.

Change-Id: I20b45190f1eaca0229d30871b25484b90298a18b
Merge "L3 API support for nicira plugin"