migration: change initial value of expected_downtime

0 is a very bad initial value, what we are trying to get is
max_downtime, so that is a much better estimation.

Signed-off-by: Juan Quintela <quintela@redhat.com>


Reviewed-by: Orit Wasserman <owasserm@redhat.com>

migration.c

@@ -774,6 +774,8 @@ void migrate_fd_connect(MigrationState *s)
     s->buffer = NULL;
     s->buffer_size = 0;
     s->buffer_capacity = 0;
+    /* This is a best 1st approximation. ns to ms */
+    s->expected_downtime = max_downtime/1000000;
 
     s->xfer_limit = s->bandwidth_limit / XFER_LIMIT_RATIO;
     s->complete = false;