CORD-1972: Add generic support for EPC-child service relations
CORD-1972: Add generic support for EPC-child service relations

Change-Id: I505d3b82b0925f173a0495014c346a6d67ada007
(cherry picked from commit 2189011c7219c6669dd97be71be2fe0ec9e7edc8)

opencord/xos,open-cloud/xos,open-cloud/xos,opencord/xos,opencord/xos,open-cloud/xos