Add support for passing git revision through a parameterized build trigger.

Change-Id: Id937a278b04f2a590e9b1606b18634f584032bb8
Reviewed-on: https://review.openstack.org/22555
Reviewed-by: Monty Taylor <mordred@inaugust.com>
Approved: Clark Boylan <clark.boylan@gmail.com>
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Tested-by: Jenkins
Add support to copyartifact builder for flattening dirs

Change-Id: I72278b220dcd61dd323da91c8cbd0282b8d0f97c
Reviewed-on: https://review.openstack.org/22556
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Reviewed-by: Khai Do <zaro0508@gmail.com>
Reviewed-by: Kiall Mac Innes <kiall@hp.com>
Approved: Monty Taylor <mordred@inaugust.com>
Reviewed-by: Monty Taylor <mordred@inaugust.com>
Tested-by: Jenkins