[dts] [PATCH V1]framework/test_case: fix tear down fail will lost suite results

[Tu, Lijuan]

> *. this patch fix if got exception in tear down method of testsuite will lost result
> scilently
> 
> Signed-off-by: Xiao Qimai <qimaix.xiao at intel.com>
> ---
>  framework/test_case.py | 12 +++++++++++-

Applied