Install git from git-core ppa for oneiric.
Install git from git-core ppa for oneiric.

Fixes 1034130.

Oneiric git is very slow with precise due to a version mismatch madness.

Change-Id: I2eb54848cd671e091879dd2f6a57f32a2ac6405b
Reviewed-on: https://review.openstack.org/10843
Reviewed-by: James E. Blair <e81a02a9d6405977f63a769d9f6ec8ed9d924325@inaugust.com>
Approved: Monty Taylor <37c07a49ee3d5191376d758eb1d8298b34456b8e@inaugust.com>
Reviewed-by: Monty Taylor <37c07a49ee3d5191376d758eb1d8298b34456b8e@inaugust.com>
Tested-by: Jenkins

open-switch/infra_puppet-jenkins,open-switch/infra_puppet-jenkins