[BUG] Make failed async task report failure on Kafka topic

- In event of async task timeout, error code 102
  (DMI_SERVICE_NOT_RESPONDING) is sent to client topic.
- In event of unexpected error (such as database unavailable),
  error code 108 (UNKNOWN_ERROR) is sent to client topic.
- The default timeouts have been adjusted so that the task
  timeout (60s) is longer than the HTTP and Database timeouts (30s),
  so that expected codes are returned.

Issue-ID: CPS-2186
Signed-off-by: danielhanrahan <daniel.hanrahan@est.tech>
Change-Id: I84c3447a625e084c445ab2f5c01e2b32a0c971ac