[FIX] stock_planning: Fix travis error.
[FIX] stock_planning: Fix travis error.

odoomrp/odoomrp-wip,jobiols/odoomrp-wip,agaldona/odoomrp-wip-1,jobiols/odoomrp-wip,sergiocorato/odoomrp-wip,Daniel-CA/odoomrp-wip-public,odoomrp/odoomrp-wip,Daniel-CA/odoomrp-wip-public,agaldona/odoomrp-wip-1,sergiocorato/odoomrp-wip