Correct typo and a wrong value in nvp.ini.erb

Change-Id: Ica7d5f813a44e841c46ca0a3979431f919e76bdb
Allow building OVS from souce

The lastest version of OVS in Ubuntu 12.04 is
quite old (1.4). 1.9 is the new LTS supported
version and 1.11 is the newest head version.

Version 1.10/1.11 has many new features and
performance improvements, so there is a benefit
in being able to install it over the default 1.4
packages.

By default, nothing changes in this patch.
You must explicitly set
['openstack']['network']['openvswitch']['use_source_version']
to true in order to enable it.

Change-Id: I3779b6b73f3e2c0a56d3bed6bf3e3a4184649c24
Merge "Allow building OVS from souce"
Add check for the external interface

Because ovs-vsctl add-port simply updates the OVS db, it will
dutifully add it to the configuation even if the external
interface doesn't exist on the system.

The end result of this is that traffic will silently die as it
attempts to go to the wire.

This check verifies the external interface is present on the system
and doesn't attempt to add it to the external bridge unless it exists.

Change-Id: Ic93e21e34bc14fac06e764e06f335630c3c6eac4
Allow Neutron quota driver to be configured

We were hard-coding the quota driver in quantum.conf
by keeping the default commented out. This patch adds
the ability to set the driver.

fixes lp 1234324

Change-Id: Ia90a5afcf550e20bb85fef5ec50f6aa9075992cb