MDEV-18182 : Galera test failure on galera.galera_many_tables_nopk

Decrease the number of tables and operations.

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

@@ -6,16 +6,16 @@ START TRANSACTION;
 COMMIT;
 connection node_2;
 CREATE TABLE sum_table (f1 INTEGER);
-SELECT SUM(f1) = 900 FROM sum_table;
-SUM(f1) = 900
+SELECT SUM(f1) = 100 FROM sum_table;
+SUM(f1) = 100
 1
 connection node_1;
 SET AUTOCOMMIT=OFF;
 START TRANSACTION;
 connection node_2;
 SET AUTOCOMMIT=OFF;
 START TRANSACTION;
-UPDATE t900 SET f1 = 3;
+UPDATE t100 SET f1 = 3;
 connection node_1;
 COMMIT;
 connection node_2;

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

@@ -7,18 +7,17 @@ if (!`SELECT @@open_files_limit >= 1024`){
 }
 
 #
-# This test forces 900 tables without a PK to participate in a single
-# transaction. The reason for 900 is that some linux system has by default
-# a limit of 1024 open files / process
+# This test forces 100 tables without a PK to participate in a single
+# transaction.
 #
 
 #
-# First, create 900 tables
+# First, create 100 tables
 #
 
 --connection node_1
 
---let $count = 900
+--let $count = 100
 while ($count)
 {
   --disable_query_log
@@ -28,7 +27,7 @@ while ($count)
   --dec $count
 }
 
---let $count = 900
+--let $count = 100
 while ($count)
 {
   --disable_query_log
@@ -39,13 +38,13 @@ while ($count)
 }
 
 #
-# Second, perform 900 updates
+# Second, perform 100 updates
 #
 
 SET AUTOCOMMIT=OFF;
 START TRANSACTION;
 
---let $count = 900
+--let $count = 100
 while ($count)
 {
   --disable_query_log
@@ -63,7 +62,7 @@ COMMIT;
 --connection node_2
 CREATE TABLE sum_table (f1 INTEGER);
 
---let $count = 900
+--let $count = 100
 while ($count)
 {
   --disable_query_log
@@ -73,7 +72,7 @@ while ($count)
   --dec $count
 }
 
-SELECT SUM(f1) = 900 FROM sum_table;
+SELECT SUM(f1) = 100 FROM sum_table;
 
 #
 # Fourth, create a deadlock
@@ -83,7 +82,7 @@ SELECT SUM(f1) = 900 FROM sum_table;
 SET AUTOCOMMIT=OFF;
 START TRANSACTION;
 
---let $count = 900
+--let $count = 100
 while ($count)
 {
   --disable_query_log
@@ -96,7 +95,7 @@ while ($count)
 --connection node_2
 SET AUTOCOMMIT=OFF;
 START TRANSACTION;
-UPDATE t900 SET f1 = 3;
+UPDATE t100 SET f1 = 3;
 
 --connection node_1
 COMMIT;