sync_detection_SUITE: Wait for sync status for 30 seconds

... instead of the previous 10 seconds. This helps eager_sync_SUITE
which times out quite often with Erlang 20.

Author: dumbbell

test/sync_detection_SUITE.erl

@@ -213,7 +213,7 @@ slave_pids(Node, Queue) ->
 %% The mnesia synchronization takes a while, but we don't want to wait for the
 %% test to fail, since the timetrap is quite high.
 wait_for_sync_status(Status, Node, Queue) ->
-    Max = 10000 / ?LOOP_RECURSION_DELAY,
+    Max = 30000 / ?LOOP_RECURSION_DELAY,
     wait_for_sync_status(0, Max, Status, Node, Queue).
 
 wait_for_sync_status(N, Max, Status, Node, Queue) when N >= Max ->