fix (engine): avoid creation of NoWorkerModelMatch warning with empty requirement
fix (engine): avoid creation of NoWorkerModelMatch warning with empty requirement

Signed-off-by: Pierre Roullon <9affa5bab2c3b734533c026b045b4454f93fba03@corp.ovh.com>

ovh/cds,ovh/cds,ovh/cds,ovh/cds,ovh/cds