[dts] [PATCH V1] tests/TestSuite_dcf_lifecycle:change the way to get cores

[Tu, Lijuan]

> 1.change the way to get cores, some env cores are less than 14, it makes
> testpmd launch failed. And when several testpmd are started at the same
> time, different cores should be used.
> 2.the ACL rule id need to match, not hard code.
> 
> Signed-off-by: Xie wei <weix.xie at intel.com>

Applied with commit message changed