Really use try_imports.

Change-Id: Icad95a835ace5f75908c4c8ee0304fe528959ec3
Reviewed-on: https://review.openstack.org/17260
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Approved: Monty Taylor <mordred@inaugust.com>
Reviewed-by: Monty Taylor <mordred@inaugust.com>
Tested-by: Jenkins
1 file changed