sporadic failures of binlog_encryption.rpl_parallel_gco_wait_kill

CURRENT_TEST: binlog_encryption.rpl_parallel_gco_wait_kill
mysqltest: In included file "./suite/rpl/t/rpl_parallel_gco_wait_kill.test":
included from /home/buildbot/amd64-ubuntu-2004-debug/build/mysql-test/suite/binlog_encryption/rpl_parallel_gco_wait_kill.test at line 2:
At line 334: Can't initialize replace from 'replace_result $thd_id THD_ID'

An sql thread can reach the "Slave has read all relay log" state
and then start reading relay log again. Let's use a more generic
pattern to retrieve the sql thread ID even if it's not
in the "read all relay log" state.

mysql-test/suite/rpl/t/rpl_parallel_gco_wait_kill.test

@@ -300,7 +300,7 @@ SET GLOBAL slave_parallel_threads=10;
 # Find the thread id of the driver SQL thread that we want to kill.
 --let $wait_condition= SELECT COUNT(*) = 1 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE STATE LIKE '%Slave has read all relay log%'
 --source include/wait_condition.inc
---let $thd_id= `SELECT ID FROM INFORMATION_SCHEMA.PROCESSLIST WHERE STATE LIKE '%Slave has read all relay log%'`
+--let $thd_id= `SELECT ID FROM INFORMATION_SCHEMA.PROCESSLIST WHERE STATE LIKE '%relay log%'`
 SET @old_max_queued= @@GLOBAL.slave_parallel_max_queued;
 SET GLOBAL slave_parallel_max_queued=9000;