update wsrep test for 26.4.21

Author: vuvova

mysql-test/suite/wsrep/r/wsrep_provider_plugin_defaults.result

@@ -1184,16 +1184,16 @@ COMMAND_LINE_ARGUMENT	REQUIRED
 GLOBAL_VALUE_PATH	NULL
 VARIABLE_NAME	WSREP_PROVIDER_SOCKET_SSL_CIPHER
 SESSION_VALUE	NULL
-GLOBAL_VALUEOFF
+GLOBAL_VALUE
 GLOBAL_VALUE_ORIGIN	COMPILE-TIME
-DEFAULT_VALUEOFF
+DEFAULT_VALUE
 VARIABLE_SCOPE	GLOBAL
-VARIABLE_TYPEBOOLEAN
+VARIABLE_TYPEVARCHAR
 VARIABLE_COMMENT	Wsrep provider option
 NUMERIC_MIN_VALUE	NULL
 NUMERIC_MAX_VALUE	NULL
 NUMERIC_BLOCK_SIZE	NULL
-ENUM_VALUE_LISTOFF,ON
+ENUM_VALUE_LISTNULL
 READ_ONLY	YES
 COMMAND_LINE_ARGUMENT	REQUIRED
 GLOBAL_VALUE_PATH	NULL

mysql-test/suite/wsrep/t/wsrep_provider_plugin_defaults.test

@@ -1,7 +1,7 @@
 --source include/have_wsrep.inc
 --source include/have_innodb.inc
 
---let $galera_version=26.4.16
+--let $galera_version=26.4.21
 source include/check_galera_version.inc;
 
 SELECT COUNT(*) FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME LIKE 'wsrep_provider%' AND VARIABLE_NAME NOT IN (