kola/tests/kubernetes: fix blank NewMachine invocations
kola/tests/kubernetes: fix blank NewMachine invocations

mjg59/mantle,quantum/coreos-mantle,quantum/coreos-mantle,marineam/mantle,mjg59/mantle,dm0-/mantle,marineam/mantle,glevand/coreos--mantle,glevand/coreos--mantle,dm0-/mantle