MDEV-31173 : Server crashes when setting wsrep_cluster_address after adding...

MDEV-31173 : Server crashes when setting wsrep_cluster_address after adding invalid value to wsrep_allowlist table

Problem was that wsrep_schema tables were not marked as
category information. Fix allows access to wsrep_schema
tables even when node is detached.
Signed-off-by: Julius Goryavsky <julius.goryavsky@mariadb.com>

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

@@ -11,12 +11,21 @@ SET GLOBAL WSREP_ON=0;
 SELECT COUNT(*) AS EXPECT_0 FROM mysql.wsrep_streaming_log;
 EXPECT_0
 0
+SELECT COUNT(*) AS EXPECT_0 FROM mysql.wsrep_allowlist;
+EXPECT_0
+0
 SELECT COUNT(*) AS EXPECT_1 FROM mysql.wsrep_cluster;
 EXPECT_1
 1
 SELECT COUNT(*) AS EXPECT_2 FROM mysql.wsrep_cluster_members;
 EXPECT_2
 2
+INSERT INTO mysql.wsrep_allowlist (ip) VALUES (0);
+SET GLOBAL wsrep_cluster_address = @wsrep_cluster_address_orig;
+SELECT 1;
+1
+1
+DELETE FROM mysql.wsrep_allowlist;
 connection node_1;
 SET GLOBAL wsrep_provider_options ='pc.ignore_sb=true';
 connection node_2;

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

@@ -13,9 +13,15 @@ SET @wsrep_provider_options_orig = @@GLOBAL.wsrep_provider_options;
 SET @wsrep_cluster_address_orig = @@GLOBAL.wsrep_cluster_address;
 SET GLOBAL WSREP_ON=0;
 SELECT COUNT(*) AS EXPECT_0 FROM mysql.wsrep_streaming_log;
+SELECT COUNT(*) AS EXPECT_0 FROM mysql.wsrep_allowlist;
 SELECT COUNT(*) AS EXPECT_1 FROM mysql.wsrep_cluster;
 SELECT COUNT(*) AS EXPECT_2 FROM mysql.wsrep_cluster_members;
 
+INSERT INTO mysql.wsrep_allowlist (ip) VALUES (0);
+SET GLOBAL wsrep_cluster_address = @wsrep_cluster_address_orig;
+SELECT 1;
+DELETE FROM mysql.wsrep_allowlist;
+
 --connection node_1
 SET GLOBAL wsrep_provider_options ='pc.ignore_sb=true';