Functional test: improve test to run on target

-Prevent the test linking with the plugin to allow using any plugin
location
-use customizable plugin path and name.

Bug: 130284799
Test: make

Change-Id: Ie694e8d6664220da06027e8b717e7db21ded0d3e
Signed-off-by: François Gaffie <francois.gaffie@renault.com>
5 files changed