MDEV-15948 Followup commit

* Increased timeout counter in galera_wait_ready.inc

* Replaced useless include/wait_until_ready.inc after start_mysqld.inc
  in galera_st_*.inc with wait_condition on cluster size.

mysql-test/include/galera_wait_ready.inc

@@ -6,7 +6,7 @@
 --enable_reconnect
 --disable_query_log
 --disable_result_log
-let $wait_counter = 300;
+let $wait_counter = 600;
 while ($wait_counter)
 {
   --disable_abort_on_error

mysql-test/suite/galera/include/galera_st_clean_slave.inc

@@ -64,7 +64,9 @@ INSERT INTO t1 VALUES ('node1_to_be_rollbacked_after');
 --connection node_2
 --echo Starting server ...
 --source include/start_mysqld.inc
---source include/wait_until_ready.inc
+
+--let $wait_condition = SELECT VARIABLE_VALUE = 2 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size'
+--source include/wait_condition.inc
 
 SET AUTOCOMMIT=OFF;
 START TRANSACTION;

mysql-test/suite/galera/include/galera_st_kill_slave.inc

@@ -59,7 +59,9 @@ INSERT INTO t1 VALUES ('node1_to_be_rollbacked_after');
 
 --echo Starting server ...
 --source include/start_mysqld.inc
---source include/wait_until_ready.inc
+
+--let $wait_condition = SELECT VARIABLE_VALUE = 2 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size'
+--source include/wait_condition.inc
 
 SET AUTOCOMMIT=OFF;
 START TRANSACTION;

mysql-test/suite/galera/include/galera_st_kill_slave_ddl.inc

@@ -72,7 +72,9 @@ INSERT INTO t1 (f1) VALUES ('node1_to_be_rollbacked_after');
 --connection node_2
 --echo Starting server ...
 --source include/start_mysqld.inc
---source include/wait_until_ready.inc
+
+--let $wait_condition = SELECT VARIABLE_VALUE = 2 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size'
+--source include/wait_condition.inc
 
 SET AUTOCOMMIT=OFF;
 START TRANSACTION;

mysql-test/suite/galera/include/galera_st_shutdown_slave.inc

@@ -56,7 +56,9 @@ INSERT INTO t1 VALUES ('node1_to_be_rollbacked_after');
 --connection node_2
 --echo Starting server ...
 --source include/start_mysqld.inc
---source include/wait_until_ready.inc
+
+--let $wait_condition = SELECT VARIABLE_VALUE = 2 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size'
+--source include/wait_condition.inc
 
 SET AUTOCOMMIT=OFF;
 START TRANSACTION;