Project openstack/openstack needs to be excluded

[Ilya Shakhat]

Recently a new project with name openstack was added. That turned into 2 issues:
 * That project contains all core projects as submodules, as result all commits are duplicated
 * All emails are marked as belonging to 'openstack' as all of them has '[openstack' pattern in subject

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/54772

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/54772
Committed: http://github.com/stackforge/stackalytics/commit/bce1cc2d4f287e925c81dc4d42009b7f8ced0d71
Submitter: Jenkins
Branch: master

commit bce1cc2d4f287e925c81dc4d42009b7f8ced0d71
Author: Ilya Shakhat <email address hidden>
Date: Thu Oct 31 20:29:51 2013 +0400

    Project 'openstack/openstack' is excluded from analysis

    That project has all core projects as sub-modules. As result commits
    are assigned incorrectly and all emails are assigned to 'openstack/openstack'.

    The change introduces parameter 'exclude' for project source.

    Resolves bug 1246785

    Change-Id: I35a004382b187e4322e65f898177f91deced1dac