Scheduler event communication, receives 'fetch_downstream' from Fetch and send 'fetch_upstream' to Fetch. Receives 'sched_upstream' from Sync, and send 'sched_downstream' to Sync.
Scheduler event communication, receives 'fetch_downstream' from Fetch and send 'fetch_upstream' to Fetch.
Receives 'sched_upstream' from Sync, and send 'sched_downstream' to Sync.

Signed-off-by: fabriciocosta <7c5c653b895a27068ef94ec9f254819a0cdfe4fe@moldeointeractive.com.ar>

inaes-tic/mbc-mosto