Fix vPing success criteria evaluation bugfix
Fix vPing success criteria evaluation bugfix

Switching back to the odl approach. Need more discussions
to see how to evaluate the result from testcases.yaml

Change-Id: Iaa866db3010d35bd2cc427190dfe64db6b732a93
Signed-off-by: jose.lausuch <a4ed9890ad7f6494ac84a749f29a4dc3449a1186@ericsson.com>

mywulin/functest,opnfv/functest,opnfv/functest,mywulin/functest