Revert "add apn as an configuration option for diameter auth service (ocs-525)"
Revert "add apn as an configuration option for diameter auth service (ocs-525)"

This reverts commit c7b66d97cbbbaa62ae58d64a2d4022b82aa1232b.

sigscale/ocs,sigscale/ocs,sigscale/ocs,sigscale/ocs