[dts] [PATCH V1] tests/cvl_switch_filter:update class name and instance Packet class

[Tu, Lijuan]

> > 1. Suite TestSuite_cvl_dcf_switch_filter.py and TestSuite_cvl_switch_filter.py
> > have the same class name, lead to logs generated in one log file.
>  >2. Class packet have not instantiated.
> > 
> > Signed-off-by: Jianwei Mei <jianweix.mei at intel.com>
> > ---
> >  tests/TestSuite_cvl_switch_filter.py | 3 ++-
> Acked-by: Nannan Lu <nannan.lu at intel.com>

Applied, thanks