added flag --yes to install_rally to force install dependencies
added flag --yes to install_rally to force install dependencies

Change-Id: Ie199acd062633cda3ec3745ce4a506d247873780
Signed-off-by: jose.lausuch <a4ed9890ad7f6494ac84a749f29a4dc3449a1186@ericsson.com>

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