MDEV-17061: Test failure on galera.galera_gcs_fc_limit

Remove unnecessary sleeps and fix wait_condition to use
wsrep_flow_control_paused i.e. we wait until flow control
pauses a transaction on master.

mysql-test/suite/galera/disabled.def

@@ -27,7 +27,6 @@ galera_binlog_rows_query_log_events: MariaDB does not support binlog_rows_query_
 galera_binlog_stmt_autoinc : MDEV-13549 auto_increment mismatch
 galera_flush :  MariaDB does not have global.thread_statistics
 galera_gcache_recover_manytrx : MDEV-18834 Galera test failure
-galera_gcs_fc_limit : MDEV-17061 Timeout in wait_condition.inc for PROCESSLIST
 galera_ist_mariabackup : MDEV-18829 test leaves port open
 galera_ist_progress: MDEV-15236 fails when trying to read transfer status
 galera_kill_applier : race condition at the start of the test

mysql-test/suite/galera/r/galera_gcs_fc_limit.result

-CREATE TABLE t1 (f1 INTEGER) ENGINE=InnoDB;
-INSERT INTO t1 VALUES (1);
-SELECT COUNT(*) = 1 FROM t1;
-COUNT(*) = 1
+CREATE TABLE t1 (f1 INTEGER NOT NULL PRIMARY KEY AUTO_INCREMENT,B INTEGER) ENGINE=InnoDB;
+INSERT INTO t1 VALUES (1,1);
+SET SESSION wsrep_sync_wait=15;
+SELECT COUNT(*) FROM t1;
+COUNT(*)
 1
 SET GLOBAL wsrep_provider_options = 'gcs.fc_limit=1';
 LOCK TABLE t1 WRITE;
-INSERT INTO t1 VALUES (2);
-INSERT INTO t1 VALUES (3);
-INSERT INTO t1 VALUES (4);
-INSERT INTO t1 VALUES (5);
+FLUSH STATUS;
+INSERT INTO t1 VALUES (2,2);
+INSERT INTO t1 VALUES (3,3);
+INSERT INTO t1 VALUES (4,4);
+INSERT INTO t1(B) SELECT B FROM t1;
+# In node_1 either insert or commit should be stuck
 UNLOCK TABLES;
-INSERT INTO t1 VALUES (6);
-SELECT COUNT(*) = 6 FROM t1;
-COUNT(*) = 6
-1
+INSERT INTO t1 VALUES (NULL,6);
+SELECT COUNT(*) FROM t1;
+COUNT(*)
+9
 DROP TABLE t1;

mysql-test/suite/galera/t/galera_gcs_fc_limit.test

@@ -5,12 +5,12 @@
 --source include/galera_cluster.inc
 --source include/have_innodb.inc
 
-CREATE TABLE t1 (f1 INTEGER) ENGINE=InnoDB;
-INSERT INTO t1 VALUES (1);
+CREATE TABLE t1 (f1 INTEGER NOT NULL PRIMARY KEY AUTO_INCREMENT,B INTEGER) ENGINE=InnoDB;
+INSERT INTO t1 VALUES (1,1);
 
 --connection node_2
-SELECT COUNT(*) = 1 FROM t1;
---sleep 1
+SET SESSION wsrep_sync_wait=15;
+SELECT COUNT(*) FROM t1;
 
 --let $wsrep_provider_options_orig = `SELECT @@wsrep_provider_options`
 SET GLOBAL wsrep_provider_options = 'gcs.fc_limit=1';
@@ -19,24 +19,22 @@ SET GLOBAL wsrep_provider_options = 'gcs.fc_limit=1';
 LOCK TABLE t1 WRITE;
 
 --connection node_1
---sleep 1
-INSERT INTO t1 VALUES (2);
---sleep 2
-INSERT INTO t1 VALUES (3);
---sleep 2
-INSERT INTO t1 VALUES (4);
---sleep 2
+FLUSH STATUS;
+INSERT INTO t1 VALUES (2,2);
+INSERT INTO t1 VALUES (3,3);
+INSERT INTO t1 VALUES (4,4);
 
 # This query will hang because flow control will kick in
 --send
-INSERT INTO t1 VALUES (5);
---sleep 2
+INSERT INTO t1(B) SELECT B FROM t1;
 
 --let $galera_connection_name = node_1a
 --let $galera_server_number = 1
 --source include/galera_connect.inc
 --connection node_1a
---let $wait_condition = SELECT COUNT(*) = 1 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE STATE = 'query end' AND INFO = 'INSERT INTO t1 VALUES (5)';
+
+--echo # In node_1 either insert or commit should be stuck
+--let $wait_condition = SELECT VARIABLE_VALUE > 0 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_flow_control_paused';
 --source include/wait_condition.inc
 
 --connection node_2
@@ -46,11 +44,11 @@ UNLOCK TABLES;
 --connection node_1
 --reap
 
-INSERT INTO t1 VALUES (6);
+INSERT INTO t1 VALUES (NULL,6);
 
 --connection node_2
 # Replication catches up and continues normally
-SELECT COUNT(*) = 6 FROM t1;
+SELECT COUNT(*) FROM t1;
 
 --disable_query_log
 --eval SET GLOBAL wsrep_provider_options = '$wsrep_provider_options_orig';