PEL: Add SRC::getErrorDetails() unit test
PEL: Add SRC::getErrorDetails() unit test

Tests the registry message string placeholder substitution

Signed-off-by: Harisuddin Mohamed Isa <d8aeb45f758103e2ef97301d25493eb8a54a9484@gmail.com>
Change-Id: If89609a911403a76bd6044f81e0f464e38aec8f2

openbmc/phosphor-logging,openbmc/phosphor-logging,openbmc/phosphor-logging,openbmc/phosphor-logging