[PATCH 09/25] tests: Clean up 'test_expiry'

[Andy Doan]

On 06/23/2016 04:53 PM, Stephen Finucane wrote:
> * Make use of 'create_' helper functions
> * Include every import on its own line
> * Use underscore_case, rather than camelCase
>
> Signed-off-by: Stephen Finucane <stephen.finucane at intel.com>

Reviewed-by: Andy Doan <andy.doan at linaro.org>