StartService Protected hangs when Core cannot get valid cert

[iCollin]

Bug Report

REQUEST_RECEIVED hangs for protected service when core cannot get valid cert

Reproduction Steps

1. Remove all certificates from SDL core
2. SDL Core ini ForceProtectedService does not include 0x0A
3. SDL Core policy table has invalid 0x07 endpoint
4. Start SDL Core and HMI
5. Connect App to Core, Activate App
6. Attempt to start Protected Audio Service
7. SDL Core tries to PTU to get a certificate, but the PTU fails

Expected Behavior

SDL Core replies with PROTECTION_DISABLED within some reasonable time

Observed Behavior

SDL Core does not reply to StartService within some reasonable time

[iCollin]

Core will reply to StartService after the entire retry sequence has completed (all retries from seconds_between_retry in PT have timed out)

[iCollin]

Closed in favor of #3739