Run vnfs in parallel
Run vnfs in parallel

Jenkins slaves must be limited to 2 (default setup) if needed.

Change-Id: Ic05552085988efda0ff4a283ff84942e263750ca
Signed-off-by: Cédric Ollivier <d48310251a4a484d041bc5d09a9ac4d86d20f793@orange.com>

opnfv/functest,opnfv/functest