Add new biDirectional parameter for particular testcase

Add new biDirectional parameter for particular testcase

This change introduces new parameter which sets the communication
between ports either uni-directional or bi-directional.

JIRA: VSPERF-27
Change-Id: I4eb06f5c91ef42147878cb68cbad24e69eb002c1
Signed-off-by: Radek Zetik <radekx.zetik@intel.com>
Reviewed-by: Maryam Tahhan <maryam.tahhan@intel.com>
Reviewed-by: Meghan Halton <meghan.halton@intel.com>
Reviewed-by: Billy O Mahony <billy.o.mahony@intel.com>
Reviewed-by: Martin Klozik <martinx.klozik@intel.com>
Reviewed-by: Dino Simeon Madarang <dino.simeonx.madarang@intel.com>