c.Assert(err, check.IsNil)
inst, err := is.Create(arvados.InstanceType{}, "", nil, "echo InitCommand", nil)
c.Assert(err, check.IsNil)
c.Assert(err, check.IsNil)
inst, err := is.Create(arvados.InstanceType{}, "", nil, "echo InitCommand", nil)
c.Assert(err, check.IsNil)