run_rally.py: added consistent path for functest.yaml JIRA:FUNCTEST-1
run_rally.py: added consistent path for functest.yaml
JIRA:FUNCTEST-1

Change-Id: Id7b2f7f6846724105ea0521236d03e39a2c386ec
Signed-off-by: jose.lausuch <a4ed9890ad7f6494ac84a749f29a4dc3449a1186@ericsson.com>

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