Fix an unorderable types error (if python 3)
Fix an unorderable types error (if python 3)

Change-Id: I07c5a548f10a1779faead4d9c596a1976aff8866
Signed-off-by: Cédric Ollivier <d48310251a4a484d041bc5d09a9ac4d86d20f793@orange.com>

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