Test fixes for galera_3nodes suite.

mysql-test/suite/galera/t/MDEV-20225.test

@@ -41,6 +41,8 @@ SET DEBUG_SYNC = 'RESET';
 SET GLOBAL wsrep_slave_threads = 1;
 
 # Trigger should now be dropped on node_2.
+--let $wait_condition = SELECT COUNT(*) = 0 FROM INFORMATION_SCHEMA.TRIGGERS WHERE TRIGGER_NAME like '%tr1'
+--source include/wait_condition.inc
 SHOW TRIGGERS;
 
 DROP TABLE t1;

mysql-test/suite/galera_3nodes/r/galera_safe_to_bootstrap.result

@@ -42,6 +42,10 @@ CALL mtr.add_suppression("WSREP: moving position backwards: [0-9]+ -> 0");
 CALL mtr.add_suppression("Failed to prepare for incremental state transfer");
 CALL mtr.add_suppression("It may not be safe to bootstrap the cluster from this node");
 CALL mtr.add_suppression("Aborting");
+CALL mtr.add_suppression("Plugin 'wsrep' init function returned error.");
+CALL mtr.add_suppression("Plugin 'wsrep' registration as a STORAGE ENGINE failed.");
+CALL mtr.add_suppression("Failed to initialize plugins.");
+CALL mtr.add_suppression("WSREP: gcs/src/gcs_core.cpp:core_handle_uuid_msg()");
 connection node_3;
 CALL mtr.add_suppression("WSREP: no nodes coming from prim view, prim not possible");
 CALL mtr.add_suppression("WSREP: It may not be safe to bootstrap the cluster from this node");
@@ -51,6 +55,10 @@ CALL mtr.add_suppression("WSREP: moving position backwards: [0-9]+ -> 0");
 CALL mtr.add_suppression("Failed to prepare for incremental state transfer");
 CALL mtr.add_suppression("It may not be safe to bootstrap the cluster from this node");
 CALL mtr.add_suppression("Aborting");
+CALL mtr.add_suppression("Plugin 'wsrep' init function returned error.");
+CALL mtr.add_suppression("Plugin 'wsrep' registration as a STORAGE ENGINE failed.");
+CALL mtr.add_suppression("Failed to initialize plugins.");
+CALL mtr.add_suppression("WSREP: gcs/src/gcs_core.cpp:core_handle_uuid_msg()");
 SHOW CREATE TABLE t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (

mysql-test/suite/galera_3nodes/t/galera_safe_to_bootstrap.test

@@ -179,6 +179,10 @@ CALL mtr.add_suppression("WSREP: moving position backwards: [0-9]+ -> 0");
 CALL mtr.add_suppression("Failed to prepare for incremental state transfer");
 CALL mtr.add_suppression("It may not be safe to bootstrap the cluster from this node");
 CALL mtr.add_suppression("Aborting");
+CALL mtr.add_suppression("Plugin 'wsrep' init function returned error.");
+CALL mtr.add_suppression("Plugin 'wsrep' registration as a STORAGE ENGINE failed.");
+CALL mtr.add_suppression("Failed to initialize plugins.");
+CALL mtr.add_suppression("WSREP: gcs/src/gcs_core.cpp:core_handle_uuid_msg()");
 
 --connection node_3
 CALL mtr.add_suppression("WSREP: no nodes coming from prim view, prim not possible");
@@ -189,6 +193,11 @@ CALL mtr.add_suppression("WSREP: moving position backwards: [0-9]+ -> 0");
 CALL mtr.add_suppression("Failed to prepare for incremental state transfer");
 CALL mtr.add_suppression("It may not be safe to bootstrap the cluster from this node");
 CALL mtr.add_suppression("Aborting");
+CALL mtr.add_suppression("Plugin 'wsrep' init function returned error.");
+CALL mtr.add_suppression("Plugin 'wsrep' registration as a STORAGE ENGINE failed.");
+CALL mtr.add_suppression("Failed to initialize plugins.");
+CALL mtr.add_suppression("WSREP: gcs/src/gcs_core.cpp:core_handle_uuid_msg()");
+
 SHOW CREATE TABLE t1;
 
 DROP TABLE t1;