[PATCH 6/6] tests: Don't create model objects unless necessary

[Andy Doan]

On 06/30/2016 12:30 PM, Stephen Finucane wrote:
> Creating model objects when not required introduces unnecessary
> overhead and delays the tests. Avoid this by only creating new objects
> when one isn't provided for us already.
>
> Signed-off-by: Stephen Finucane <stephen.finucane at intel.com>

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