Update ceritificate error path response code
Update ceritificate error path response code

Valid response code ${HTTP_NOT_FOUND}, ${HTTP_INTERNAL_SERVER_ERROR}

Change-Id: Icca233bbf1e85421c74e955de98b3c3574ae138c
Signed-off-by: George Keishing <bef0a9ecac45fb57611777c8270153994e13fd2e@in.ibm.com>

openbmc/openbmc-test-automation,openbmc/openbmc-test-automation