Deflake test ync should continue if not all slaves dropped dual-channel-replication (valkey-io#1164)

Sometimes when dual-channel is turned off the tested replica might
disconnect on COB overrun. disable the replica COB limit in order to
prevent such cases.

Fixes: valkey-io#1153

Signed-off-by: Ran Shidlansik <[email protected]>
Signed-off-by: Binbin <[email protected]>
Co-authored-by: Binbin <[email protected]>

Author: ranshid

tests/integration/dual-channel-replication.tcl

@@ -842,11 +842,11 @@ start_server {tags {"dual-channel-replication external:skip"}} {
     $primary config set dual-channel-replication-enabled yes
     $primary config set loglevel debug
     $primary config set repl-diskless-sync-delay 5
-    
+    $primary config set client-output-buffer-limit "replica 0 0 0"
+
     # Generating RDB will cost 5s(10000 * 0.0005s)
     $primary debug populate 10000 primary 1
     $primary config set rdb-key-save-delay 500
-
     $primary config set dual-channel-replication-enabled $dualchannel
 
     start_server {} {