up test uses correct path for cpi artifact
up test uses correct path for cpi artifact

[#152223569]

Signed-off-by: Rowan Jacobs <f6a1b0cdf5ee40839db77d8af28f9a0cbe9aba71@pivotal.io>

pivotal-cf-experimental/bosh-bootloader,niroyb/bosh-bootloader,pivotal-cf-experimental/bosh-bootloader,niroyb/bosh-bootloader