Change the LOG level in 040_standby_failover_slots_sync.pl to DEBUG2.
Temporarily change the log level of 040_standby_failover_slots_sync.pl to
DEBUG2. This is to get more information about BF failures. We will reset
it back to default once the tests are stabilized.
Author: Hou Zhijie
Reviewed-by: Amit Kapila
Discussion: https://postgr.es/m/
514f6f2f-6833-4539-39f1-
96cd1e011f23@enterprisedb.com
Discussion: https://postgr.es/m/OS0PR01MB571633C23B2A4CAC5FB0371A944C2@OS0PR01MB5716.jpnprd01.prod.outlook.com