tests: ceft-dft: set replicas only for the enrollment master
tests: ceft-dft: set replicas only for the enrollment master

In this way we can cover the code path involved in the transfer
of policy parameters from the enroller to the enrollee.

vmaffione/rlite,vmaffione/rlite,autrimpo/rlite,autrimpo/rlite,vmaffione/rlite,vmaffione/rlite,autrimpo/rlite,autrimpo/rlite