Simple performance Test for the PVP and PVVP

Simple performance Test for the PVP and PVVP

Two sample contionous stream testcaes were introduced for PVP and PVVP
scenarios. Required frame rate percentage can be specified either by
tetcase configuration option "iLoad" or by command line option "iload".
Command line option take precendece to testcase option. By default 100%
linerate is used if not specified otherwise.

Change-Id: I95f7ae6081377a4c99ce70fc7504b6b542f9260b
JIRA: VSPERF-95
Signed-off-by: Martin Klozik <martinx.klozik@intel.com>
Reviewed-by: Maryam Tahhan <maryam.tahhan@intel.com>
Reviewed-by: Gene Snider <eugene.snider@huawei.com>
Reviewed-by: Al Morton <acmorton@att.com>