Upgrade system first
Upgrade system first

Change-Id: I2d1b7816505370aa326e48c5aba3177a3fa844d3
Signed-off-by: Cédric Ollivier <d48310251a4a484d041bc5d09a9ac4d86d20f793@orange.com>

opnfv/functest,opnfv/functest