Tunnel and combine-sink latency fixes
This patch series fixes the latency calculations for module-tunnel and module-combine-sink. In some situations, both modules did not take into account all components that contribute to the latency which lead to jumps in the reported latency.
Additionally, module-tunnel used a fixed latency of 250ms which seems unnecessary large. The fixed latency can now be configured.
Default adjust times are updated to reflect the increased reliability of the latency reports.