Add configuration options for my.cnf

The following configuration options added:

    galera_innodb_read_io_threads: 8
    galera_innodb_write_io_threads: 8
    galera_wsrep_slave_threads: 8
    galera_xtrabackup_parallel: 4
    galera_error_log_enabled: false

Change-Id: Id1185c3a38669c37dc88806b4e9955522629ce1c
Related-Bug: https://mirantis.jira.com/browse/PROD-16528
diff --git a/metadata/service/master/container.yml b/metadata/service/master/container.yml
index c80beef..2850f77 100644
--- a/metadata/service/master/container.yml
+++ b/metadata/service/master/container.yml
@@ -5,6 +5,11 @@
     galera_server_admin_user: root
     galera_max_connections: 20000
     galera_innodb_buffer_pool_size: 3138M
+    galera_innodb_read_io_threads: 8
+    galera_innodb_write_io_threads: 8
+    galera_wsrep_slave_threads: 8
+    galera_xtrabackup_parallel: 4
+    galera_error_log_enabled: false
   kubernetes:
     control:
       configmap:
@@ -32,6 +37,11 @@
                   port: 4567
                 max_connections: ${_param:galera_max_connections}
                 innodb_buffer_pool_size: ${_param:galera_innodb_buffer_pool_size}
+                innodb_read_io_threads: ${_param:galera_innodb_read_io_threads}
+                innodb_write_io_threads: ${_param:galera_innodb_write_io_threads}
+                wsrep_slave_threads: ${_param:galera_wsrep_slave_threads}
+                xtrabackup_parallel: ${_param:galera_xtrabackup_parallel}
+                error_log_enabled: ${_param:galera_error_log_enabled}
             mysql:
               server:
                 users: